AARoads Forum

National Boards => General Highway Talk => Traffic Control => Topic started by: 1995hoo on May 19, 2023, 09:17:07 AM

Title: Signs using "must exit" instead of "exit only"
Post by: 1995hoo on May 19, 2023, 09:17:07 AM
I thought of this topic because three times in the past month, I've passed signs that use the words "MUST EXIT" in some formulation. I remember when I was growing up it seemed like Delaware preferred those words–I remember on I-295 at the US-13 interchange there were a number of signs saying either "THIS LANE MUST EXIT" (with a downward-pointing arrow) or simply "MUST EXIT." Those signs have all long since been replaced and the new signs use the now-customary "EXIT ONLY."

But last Friday I was on a southbound Acela approaching Philadelphia's 30th Street Station and I saw the following sign out the window (I didn't have my phone out and so wasn't fast enough to get a picture):
https://goo.gl/maps/RnVXSLczDYPpUEge8

Also, twice in the past month I've passed a sign on the I-495 Inner Loop in Virginia, a fairly new vertical BGS on the right side of the road as you pass through the Route 7 interchange in Tysons Corner. The sign is an advance BGS for the left-side Dulles exit and, like the sign in Philadelphia, it says "LEFT LANE MUST EXIT" (though it has the words stacked–"left lane" on one line and "must exit" on a second line underneath). I don't have any pictures because both times in the past month I was driving, traffic was reasonably heavy, and by the time I remembered the sign was there it was too late to get a picture. It's not on Google yet–their images are from October 2022 and the sign is more recent because it was posted due to construction causing changes in the lane configuration. That particular sign is interesting because the overhead signs further down the road use "EXIT ONLY."

I'm curious whether anyone has any idea how common the use of "MUST EXIT" is elsewhere. I always kind of liked that wording because I've always felt it's unambiguous. I've seen a few articles over the years in which writers have wrongly said "EXIT ONLY" means you can exit there but you can't re-enter the highway. If those people think that, surely there are others who think that as well. It's obviously an unreasonable interpretation (the interchange nearest to my house proves it), but it's still out there. "This Lane Must Exit" leaves no room for doubt what it means.




BTW, those of you who are interested in trains might take note that you can see two new Acela trainsets (not yet in passenger service) in the background of that Google Street View image if you zoom in under the BGS.
Title: Re: Signs using "must exit" instead of "exit only"
Post by: formulanone on May 19, 2023, 04:17:53 PM
I found an example west of Miami, on Killian Parkway (SR 990):

(https://live.staticflickr.com/65535/50981253312_99a5d3e3bd_b.jpg) (https://flic.kr/p/2kF3fs5)

Alberta seems to have a few; this one is just outside the Edmonton Airport...

(https://live.staticflickr.com/1886/44489562951_00b0ffb790_b.jpg) (https://flic.kr/p/2aMoD5c)

...and here's one in Calgary, also on AB 2:

(https://live.staticflickr.com/65535/48796463581_3db71839b0_b.jpg) (https://flic.kr/p/2hkYCzB)

"EXIT ONLY" seems to be more common in Alberta, however.
Title: Re: Signs using "must exit" instead of "exit only"
Post by: 1995hoo on May 19, 2023, 04:37:14 PM
A Google search for <Delaware "Must Exit" sign> turned up, among others, this one that must be relatively new in view of the Clearview. The same Google search turned up Delaware's MUTCD and it calls for "Exit Only," but I guess some newer signs adhere to their older protocol.

(https://newport.delaware.gov/wp-content/blogs.dir/17/files/newport-delaware/DSCF3769.jpg)
Title: Re: Signs using "must exit" instead of "exit only"
Post by: LilianaUwU on May 19, 2023, 05:59:10 PM
#redirect [[Delaware]]
Title: Re: Signs using "must exit" instead of "exit only"
Post by: 1995hoo on May 20, 2023, 10:48:48 AM
Quote from: LilianaUwU on May 19, 2023, 05:59:10 PM
#redirect [[Delaware]]

Except in the original post I noted seeing such this month in Pennsylvania and Virginia.
Title: Re: Signs using "must exit" instead of "exit only"
Post by: Amaury on May 20, 2023, 12:05:11 PM
Not an exit, so not sure if this counts, but: https://goo.gl/maps/4nmsYqvYfhJXcKjs7
Title: Re: Signs using "must exit" instead of "exit only"
Post by: Big John on May 20, 2023, 12:19:01 PM
^^MUTCD R3-7.  Standard sign found all over the USA.
Title: Re: Signs using "must exit" instead of "exit only"
Post by: J N Winkler on May 20, 2023, 01:25:48 PM
Quote from: 1995hoo on May 19, 2023, 09:17:07 AMI'm curious whether anyone has any idea how common the use of "MUST EXIT" is elsewhere. I always kind of liked that wording because I've always felt it's unambiguous. I've seen a few articles over the years in which writers have wrongly said "EXIT ONLY" means you can exit there but you can't re-enter the highway. If those people think that, surely there are others who think that as well. It's obviously an unreasonable interpretation (the interchange nearest to my house proves it), but it's still out there. "This Lane Must Exit" leaves no room for doubt what it means.

If memory serves, the rationale for standardizing on "Exit Only" rather than "Must Exit" back in the mid-1970's was to avoid the prescriptive overtones of the latter.  Many agencies also originally rendered these and other lane-drop-related legends in black against white (regulatory colors), but black on yellow was ultimately chosen so that drivers would not interpret "Exit Only" as an instruction to exit when they preferred to execute a safe transition to a through lane.  This issue assumes particular salience in states that penalize drivers for changing out of trap lanes, as I understand Virginia does.

I've spoken to people without experience driving in the US who have interpreted "Exit Only" as indicating re-entry is not possible at the same interchange.  However, I haven't heard that this misunderstanding doesn't go away after a few instances of observing lane-drop signing in context.  It goes the other way too:  an American friend with no overseas travel experience pointed to the British "Escape lane" sign (used for runaway truck ramps) in Know your traffic signs and asked if that was like "Exit Only" here.
Title: Re: Signs using "must exit" instead of "exit only"
Post by: jeffandnicole on May 20, 2023, 03:13:06 PM
Quote from: J N Winkler on May 20, 2023, 01:25:48 PM
Quote from: 1995hoo on May 19, 2023, 09:17:07 AMI'm curious whether anyone has any idea how common the use of "MUST EXIT" is elsewhere. I always kind of liked that wording because I've always felt it's unambiguous. I've seen a few articles over the years in which writers have wrongly said "EXIT ONLY" means you can exit there but you can't re-enter the highway. If those people think that, surely there are others who think that as well. It's obviously an unreasonable interpretation (the interchange nearest to my house proves it), but it's still out there. "This Lane Must Exit" leaves no room for doubt what it means.

If memory serves, the rationale for standardizing on "Exit Only" rather than "Must Exit" back in the mid-1970's was to avoid the prescriptive overtones of the latter.  Many agencies also originally rendered these and other lane-drop-related legends in black against white (regulatory colors), but black on yellow was ultimately chosen so that drivers would not interpret "Exit Only" as an instruction to exit when they preferred to execute a safe transition to a through lane.  This issue assumes particular salience in states that penalize drivers for changing out of trap lanes, as I understand Virginia does.

I've spoken to people without experience driving in the US who have interpreted "Exit Only" as indicating re-entry is not possible at the same interchange.  However, I haven't heard that this misunderstanding doesn't go away after a few instances of observing lane-drop signing in context.  It goes the other way too:  an American friend with no overseas travel experience pointed to the British "Escape lane" sign (used for runaway truck ramps) in Know your traffic signs and asked if that was like "Exit Only" here.

Of all the US signage, I think this is one of the most confusing phrases of language used.  "Exit Only" conveys that there's an exit, but no entrance.  To most of us, we get it what it really means.  But to most of America, especially those that don't often drive on highways or see it for the first time, the term is confusing.

There is other signage that people may not like, but people understand why the message is that's being conveyed, even to most people seeing it for the first time.  The 'Exit Only' message though never received that same knowledge.  I preferred 'Must Exit' myself.  Other messages may be better, but take up more space when limited space is available. 
Title: Re: Signs using "must exit" instead of "exit only"
Post by: Mapmikey on May 21, 2023, 10:11:27 AM
Quote from: jeffandnicole on May 20, 2023, 03:13:06 PM

Of all the US signage, I think this is one of the most confusing phrases of language used.  "Exit Only" conveys that there's an exit, but no entrance.  To most of us, we get it what it really means.  But to most of America, especially those that don't often drive on highways or see it for the first time, the term is confusing.

There is a way to convey when that actually is the situation:  https://goo.gl/maps/HCnPEpfeJ99ACc1E7

There is GMSV of the "left lane must exit" on I-495 (https://goo.gl/maps/av6xjkXUSCZxiBGL7), which is an excellent way to convey the idea that not everybody must exit here.  I imagine in the 70s the exit only phrasing might have come about because there were still plenty of freeways/interstates with temporary endings that were heavily posted with must exit signage.
Title: Re: Signs using "must exit" instead of "exit only"
Post by: 1995hoo on May 21, 2023, 03:58:11 PM
^^^^

Thanks, although that's not the sign I was thinking of (I had not noticed that one when I was driving through there). The one I was referring to is further south in between the general-purpose lanes and the exit roadway for Route 7. It doesn't show up on Street View yet.
Title: Re: Signs using "must exit" instead of "exit only"
Post by: jp the roadgeek on May 21, 2023, 04:41:46 PM
Another sign here (https://goo.gl/maps/VKMLFodAApxxT1Ut8) that was replaced with a white LEFT LANE MUST EXIT sign with the CT 9 sign replacement/exit renumbering project (not in GSV yet)
Title: Re: Signs using "must exit" instead of "exit only"
Post by: roadman65 on May 22, 2023, 04:11:41 AM
https://www.flickr.com/photos/54480415@N08/52880763799/in/photostream/
This one uses neither. Just long upward liane control arrows for I-95 South.
Title: Re: Signs using "must exit" instead of "exit only"
Post by: jakeroot on May 22, 2023, 08:03:33 PM
Quote from: roadman65 on May 22, 2023, 04:11:41 AM
https://www.flickr.com/photos/54480415@N08/52880763799/in/photostream/
This one uses neither. Just long upward liane control arrows for I-95 South.

I personally prefer this treatment, though I would like to see hook arrows for the right turn.

The only issue I have with this design, though: if there are no shared lanes, why are the signs shared? These could have easily been two separate signs. This goes for all APLs that don't have any option lanes (even if they aren't supposed to be used without option lanes).
Title: Re: Signs using "must exit" instead of "exit only"
Post by: jakeroot on May 22, 2023, 08:12:40 PM
Quote from: J N Winkler on May 20, 2023, 01:25:48 PM
If memory serves, the rationale for standardizing on "Exit Only" rather than "Must Exit" back in the mid-1970's was to avoid the prescriptive overtones of the latter.  Many agencies also originally rendered these and other lane-drop-related legends in black against white (regulatory colors), but black on yellow was ultimately chosen so that drivers would not interpret "Exit Only" as an instruction to exit when they preferred to execute a safe transition to a through lane.  This issue assumes particular salience in states that penalize drivers for changing out of trap lanes, as I understand Virginia does.

This is the best explanation I've yet to hear as to why black-on-yellow is used over black-on-white. I've always interpreted "Exit Only" as regulatory, as you have to do what the sign says if you stay in that lane. But if the idea with yellow was nothing more than to not scare drivers into thinking they had to exit (as black-on-white "Must Exit" signs may do), that makes a lot more sense.

Still, it goes against everything I learned as a driver, which is that signs warning of an upcoming turn should be black-on-white. "Exit Only" signs are exceptions because they don't tell you to do anything, sure. But apparently that was by design. But then, why are more signs not designed in this way, such as the R3-5 sign? Regulatory signs don't technically requires drivers to do that "thing" until that "thing" occurs. Eg, "right lane must turn right" applies when you reach the right turn, not when you see the sign.

Has there been any consideration of using "Must Exit" in black-on-white at the actual split, but "Exit Only" (in black-on-yellow) on signage preceding the split? Warnings at the gore point make no sense to me; you have to exit at that point.
Title: Re: Signs using "must exit" instead of "exit only"
Post by: US 89 on May 22, 2023, 08:36:22 PM
Quote from: Mapmikey on May 21, 2023, 10:11:27 AM
Quote from: jeffandnicole on May 20, 2023, 03:13:06 PM

Of all the US signage, I think this is one of the most confusing phrases of language used.  "Exit Only" conveys that there's an exit, but no entrance.  To most of us, we get it what it really means.  But to most of America, especially those that don't often drive on highways or see it for the first time, the term is confusing.

There is a way to convey when that actually is the situation:  https://goo.gl/maps/HCnPEpfeJ99ACc1E7

There is GMSV of the "left lane must exit" on I-495 (https://goo.gl/maps/av6xjkXUSCZxiBGL7), which is an excellent way to convey the idea that not everybody must exit here.  I imagine in the 70s the exit only phrasing might have come about because there were still plenty of freeways/interstates with temporary endings that were heavily posted with must exit signage.

But that's not anywhere close to standardized. Florida puts something to the effect of "no re-entry"  on a white sign by the exit. And this is how Georgia does it: https://goo.gl/maps/iv9ozf22sX2mRfET7
Title: Re: Signs using "must exit" instead of "exit only"
Post by: ran4sh on May 22, 2023, 08:37:02 PM
Quote from: Mapmikey on May 21, 2023, 10:11:27 AM
Quote from: jeffandnicole on May 20, 2023, 03:13:06 PM

Of all the US signage, I think this is one of the most confusing phrases of language used.  "Exit Only" conveys that there's an exit, but no entrance.  To most of us, we get it what it really means.  But to most of America, especially those that don't often drive on highways or see it for the first time, the term is confusing.

There is a way to convey when that actually is the situation:  https://goo.gl/maps/HCnPEpfeJ99ACc1E7


Which there is no standard for in the MUTCD, so different states do different things. Some states don't even bother indicating the absence of a re-entry ramp. (It's also sometimes implied by the absence of blue service signs, since those are only supposed to be posted if access to return to the highway is available)
Title: Re: Signs using "must exit" instead of "exit only"
Post by: ran4sh on May 22, 2023, 08:40:09 PM
Quote from: US 89 on May 22, 2023, 08:36:22 PM
Quote from: Mapmikey on May 21, 2023, 10:11:27 AM
Quote from: jeffandnicole on May 20, 2023, 03:13:06 PM

Of all the US signage, I think this is one of the most confusing phrases of language used.  "Exit Only" conveys that there's an exit, but no entrance.  To most of us, we get it what it really means.  But to most of America, especially those that don't often drive on highways or see it for the first time, the term is confusing.

There is a way to convey when that actually is the situation:  https://goo.gl/maps/HCnPEpfeJ99ACc1E7

There is GMSV of the "left lane must exit" on I-495 (https://goo.gl/maps/av6xjkXUSCZxiBGL7), which is an excellent way to convey the idea that not everybody must exit here.  I imagine in the 70s the exit only phrasing might have come about because there were still plenty of freeways/interstates with temporary endings that were heavily posted with must exit signage.

But that's not anywhere close to standardized. Florida puts something to the effect of "no re-entry"  on a white sign by the exit. And this is how Georgia does it: https://goo.gl/maps/iv9ozf22sX2mRfET7

And, in Georgia, that's *if* the sign indicates it at all. The I-285 partial interchanges with Glenridge EB and Peachtree-Dunwoody WB have never had that indication, and the 10 Loop partial interchange with Oconee Connector had its "no return access" legend removed from the sign, for example.
Title: Re: Signs using "must exit" instead of "exit only"
Post by: jeffandnicole on May 22, 2023, 09:43:39 PM
Quote from: ran4sh on May 22, 2023, 08:40:09 PM
Quote from: US 89 on May 22, 2023, 08:36:22 PM
Quote from: Mapmikey on May 21, 2023, 10:11:27 AM
Quote from: jeffandnicole on May 20, 2023, 03:13:06 PM

Of all the US signage, I think this is one of the most confusing phrases of language used.  "Exit Only" conveys that there's an exit, but no entrance.  To most of us, we get it what it really means.  But to most of America, especially those that don't often drive on highways or see it for the first time, the term is confusing.

There is a way to convey when that actually is the situation:  https://goo.gl/maps/HCnPEpfeJ99ACc1E7

There is GMSV of the "left lane must exit" on I-495 (https://goo.gl/maps/av6xjkXUSCZxiBGL7), which is an excellent way to convey the idea that not everybody must exit here.  I imagine in the 70s the exit only phrasing might have come about because there were still plenty of freeways/interstates with temporary endings that were heavily posted with must exit signage.

But that's not anywhere close to standardized. Florida puts something to the effect of "no re-entry"  on a white sign by the exit. And this is how Georgia does it: https://goo.gl/maps/iv9ozf22sX2mRfET7

And, in Georgia, that's *if* the sign indicates it at all. The I-285 partial interchanges with Glenridge EB and Peachtree-Dunwoody WB have never had that indication, and the 10 Loop partial interchange with Oconee Connector had its "no return access" legend removed from the sign, for example.

Delaware goes fancy with "No Return to Northbound "95 shield" at Harvey Rd: https://goo.gl/maps/8oSsaeiPZGTfPGfk6
Title: Re: Signs using "must exit" instead of "exit only"
Post by: 1995hoo on May 23, 2023, 07:39:42 AM
Quote from: jeffandnicole on May 22, 2023, 09:43:39 PM
Quote from: ran4sh on May 22, 2023, 08:40:09 PM
Quote from: US 89 on May 22, 2023, 08:36:22 PM
Quote from: Mapmikey on May 21, 2023, 10:11:27 AM
Quote from: jeffandnicole on May 20, 2023, 03:13:06 PM

Of all the US signage, I think this is one of the most confusing phrases of language used.  "Exit Only" conveys that there's an exit, but no entrance.  To most of us, we get it what it really means.  But to most of America, especially those that don't often drive on highways or see it for the first time, the term is confusing.

There is a way to convey when that actually is the situation:  https://goo.gl/maps/HCnPEpfeJ99ACc1E7

There is GMSV of the "left lane must exit" on I-495 (https://goo.gl/maps/av6xjkXUSCZxiBGL7), which is an excellent way to convey the idea that not everybody must exit here.  I imagine in the 70s the exit only phrasing might have come about because there were still plenty of freeways/interstates with temporary endings that were heavily posted with must exit signage.

But that's not anywhere close to standardized. Florida puts something to the effect of "no re-entry"  on a white sign by the exit. And this is how Georgia does it: https://goo.gl/maps/iv9ozf22sX2mRfET7

And, in Georgia, that's *if* the sign indicates it at all. The I-285 partial interchanges with Glenridge EB and Peachtree-Dunwoody WB have never had that indication, and the 10 Loop partial interchange with Oconee Connector had its "no return access" legend removed from the sign, for example.

Delaware goes fancy with "No Return to Northbound "95 shield" at Harvey Rd: https://goo.gl/maps/8oSsaeiPZGTfPGfk6


I've seen something similar to that somewhere else along I-95 in another state, but I'm blanking on where it was.
Title: Re: Signs using "must exit" instead of "exit only"
Post by: roadfro on May 23, 2023, 12:19:58 PM
Quote from: jakeroot on May 22, 2023, 08:12:40 PM
Quote from: J N Winkler on May 20, 2023, 01:25:48 PM
If memory serves, the rationale for standardizing on "Exit Only" rather than "Must Exit" back in the mid-1970's was to avoid the prescriptive overtones of the latter.  Many agencies also originally rendered these and other lane-drop-related legends in black against white (regulatory colors), but black on yellow was ultimately chosen so that drivers would not interpret "Exit Only" as an instruction to exit when they preferred to execute a safe transition to a through lane.  This issue assumes particular salience in states that penalize drivers for changing out of trap lanes, as I understand Virginia does.

This is the best explanation I've yet to hear as to why black-on-yellow is used over black-on-white. I've always interpreted "Exit Only" as regulatory, as you have to do what the sign says if you stay in that lane. But if the idea with yellow was nothing more than to not scare drivers into thinking they had to exit (as black-on-white "Must Exit" signs may do), that makes a lot more sense.

Still, it goes against everything I learned as a driver, which is that signs warning of an upcoming turn should be black-on-white. "Exit Only" signs are exceptions because they don't tell you to do anything, sure. But apparently that was by design. But then, why are more signs not designed in this way, such as the R3-5 sign? Regulatory signs don't technically requires drivers to do that "thing" until that "thing" occurs. Eg, "right lane must turn right" applies when you reach the right turn, not when you see the sign.

Has there been any consideration of using "Must Exit" in black-on-white at the actual split, but "Exit Only" (in black-on-yellow) on signage preceding the split? Warnings at the gore point make no sense to me; you have to exit at that point.

I think the 2009 MUTCD adopted the R3-33 "Right Lane Must Exit" regulatory sign for optional use at exit only lanes to help address this situation.

This sign I believe was adopted into the MUTCD via a state sign synthesis study, as Nevada DOT had been using a regulatory sign with same wording but slightly different layout for years at exit only lanes. NDOT commonly installs this sign on freeways at exit only lane drops (typically about halfway between the advance and exit direction overhead signs).
Title: Re: Signs using "must exit" instead of "exit only"
Post by: CtrlAltDel on May 23, 2023, 12:41:09 PM
Quote from: roadfro on May 23, 2023, 12:19:58 PM
I think the 2009 MUTCD adopted the R3-33 "Right Lane Must Exit" regulatory sign for optional use at exit only lanes to help address this situation.

This sign I believe was adopted into the MUTCD via a state sign synthesis study, as Nevada DOT had been using a regulatory sign with same wording but slightly different layout for years at exit only lanes. NDOT commonly installs this sign on freeways at exit only lane drops (typically about halfway between the advance and exit direction overhead signs).

Is that what this is?:

(https://i.imgur.com/wMt6i22.png)
Title: Re: Signs using "must exit" instead of "exit only"
Post by: ran4sh on May 23, 2023, 06:29:29 PM
No, the R3-8 depicted there is the exact same sign that would also be used on non-freeways. R3-33 is a text sign "right lane must exit"
Title: Re: Signs using &quot;must exit&quot; instead of &quot;exit only&quot;
Post by: Rothman on May 23, 2023, 06:36:53 PM
Quote from: CtrlAltDel on May 23, 2023, 12:41:09 PM
Quote from: roadfro on May 23, 2023, 12:19:58 PM
I think the 2009 MUTCD adopted the R3-33 "Right Lane Must Exit" regulatory sign for optional use at exit only lanes to help address this situation.

This sign I believe was adopted into the MUTCD via a state sign synthesis study, as Nevada DOT had been using a regulatory sign with same wording but slightly different layout for years at exit only lanes. NDOT commonly installs this sign on freeways at exit only lane drops (typically about halfway between the advance and exit direction overhead signs).

Is that what this is?:

(https://i.imgur.com/wMt6i22.png)
I hate it when option lanes are marked as exit only.
Title: Re: Signs using "must exit" instead of "exit only"
Post by: ran4sh on May 23, 2023, 06:46:51 PM
They aren't... but let's go ahead and restart that debate.
Title: Re: Signs using "must exit" instead of "exit only"
Post by: US 89 on May 23, 2023, 08:15:18 PM
Quote from: ran4sh on May 23, 2023, 06:46:51 PM
They aren't... but let's go ahead and restart that debate.

The one in that diagram is. From what I have heard on this forum and seem to have mostly observed in practice, the marking of an option lane as "exit only" is only done beyond the point where the option lane splits, as in this example in Utah (https://goo.gl/maps/XnGgaehRJUZvUMEd6). I don't like it, because you can see that sign from well before the split, but at least if you drive under that sign in the second-to-right lane you're guaranteed to exit.

In the diagram linked above, the sign with the second "exit only" arrow comes well before the actual split.
Title: Re: Signs using "must exit" instead of "exit only"
Post by: jakeroot on May 23, 2023, 10:08:46 PM
Quote from: US 89 on May 23, 2023, 08:15:18 PM
In the diagram linked above, the sign with the second "exit only" arrow comes well before the actual split.

The line showing the location of the sign on the diagram quite clearly goes off the top of the image to the split.
Title: Re: Signs using "must exit" instead of "exit only"
Post by: Henry on May 23, 2023, 11:41:05 PM
In TX and select other states, smaller "Exit Only" panels are placed over the lanes that must leave the freeway, while the option lanes get a regular white arrow indicating that traffic can stay on the freeway if they choose to instead of exiting. Here's a great example on I-45 at the I-10 exchange north of downtown Houston. (https://www.google.com/maps/@29.7721088,-95.3656117,3a,75y,336.16h,90.19t/data=!3m6!1e1!3m4!1stroL5G2Oo1-iVhdFvaOKtA!2e0!7i16384!8i8192)
Title: Re: Signs using "must exit" instead of "exit only"
Post by: roadman65 on May 24, 2023, 12:03:05 AM
Quote from: ran4sh on May 22, 2023, 08:37:02 PM
Quote from: Mapmikey on May 21, 2023, 10:11:27 AM
Quote from: jeffandnicole on May 20, 2023, 03:13:06 PM

Of all the US signage, I think this is one of the most confusing phrases of language used.  "Exit Only" conveys that there's an exit, but no entrance.  To most of us, we get it what it really means.  But to most of America, especially those that don't often drive on highways or see it for the first time, the term is confusing.

There is a way to convey when that actually is the situation:  https://goo.gl/maps/HCnPEpfeJ99ACc1E7


Which there is no standard for in the MUTCD, so different states do different things. Some states don't even bother indicating the absence of a re-entry ramp. (It's also sometimes implied by the absence of blue service signs, since those are only supposed to be posted if access to return to the highway is available)

The Garden State Parkway never signed exits that had no same direction reentries and once upon a time almost all in Ocean and Atlantic Counties had partial interchanges.

Bergen north of Passack Valley Plaza still has NB only exits with no SB entrances due to the toll plaza as the original NJHA wanted those coming from NY to first pay toll before distributing to other roadways. However, unless they added them now, they never stated no reentry to parkway at all exits north of the toll.

Edit: https://goo.gl/maps/GphUxCGnKbwoZcQx5
Exit 168 guide mentions exit only for the lane to ramp default but nothing to indicate no NB return being impossible.

https://goo.gl/maps/gwhh8mMzVN7jXkzE9
Ditto Exit 171.
Title: Re: Signs using "must exit" instead of "exit only"
Post by: US 89 on May 24, 2023, 12:06:19 AM
Quote from: jakeroot on May 23, 2023, 10:08:46 PM
Quote from: US 89 on May 23, 2023, 08:15:18 PM
In the diagram linked above, the sign with the second "exit only" arrow comes well before the actual split.

The line showing the location of the sign on the diagram quite clearly goes off the top of the image to the split.

You're right. I didn't even notice that there - I just noticed the solid lines on the road immediately to the left of where that image is.
Title: Re: Signs using "must exit" instead of "exit only"
Post by: jakeroot on May 24, 2023, 12:59:15 AM
Quote from: US 89 on May 24, 2023, 12:06:19 AM
Quote from: jakeroot on May 23, 2023, 10:08:46 PM
Quote from: US 89 on May 23, 2023, 08:15:18 PM
In the diagram linked above, the sign with the second "exit only" arrow comes well before the actual split.

The line showing the location of the sign on the diagram quite clearly goes off the top of the image to the split.

You're right. I didn't even notice that there - I just noticed the solid lines on the road immediately to the left of where that image is.

To be fair, the design has no place anywhere near an option lane, at the gore or earlier lol. Idiotic design, I don't know how it got into the MUTCD.
Title: Re: Signs using "must exit" instead of "exit only"
Post by: CtrlAltDel on May 24, 2023, 10:48:14 AM
Quote from: jakeroot on May 24, 2023, 12:59:15 AM
Quote from: US 89 on May 24, 2023, 12:06:19 AM
Quote from: jakeroot on May 23, 2023, 10:08:46 PM
Quote from: US 89 on May 23, 2023, 08:15:18 PM
In the diagram linked above, the sign with the second "exit only" arrow comes well before the actual split.

The line showing the location of the sign on the diagram quite clearly goes off the top of the image to the split.

You're right. I didn't even notice that there - I just noticed the solid lines on the road immediately to the left of where that image is.

To be fair, the design has no place anywhere near an option lane, at the gore or earlier lol. Idiotic design, I don't know how it got into the MUTCD.

How come?
Title: Re: Signs using "must exit" instead of "exit only"
Post by: 1995hoo on May 24, 2023, 11:47:18 AM
The solution I like for the issue shown in that MUTCD diagram is to use–on the sign located in advance of the exit–a partial "Exit Only" (or "Must Exit") panel over the lane that must exit and to use a standard white-on-green arrow over the option lane. Here is an example from Virginia (https://goo.gl/maps/z4YCUTMxjKpq8PCz6) in which the white-on-green arrow is partially covered with greenout; the greenout was applied sometime between 2008 and 2011 when the ramp was under construction and the exit was narrowed to the single right lane and they never removed the greenout after the left lane on the ramp reopened. If you click back to the 2008 Street View you can see the arrow without greenout.

If you then click down the road to the exit point itself, you see a full-width "Exit Only" with two arrows (https://goo.gl/maps/zXsKrrjJPrWsWz2w8)–and I'd argue that it makes sense right there because those arrows appear over the two exiting lanes. That left-hand arrow was yellowed out from sometime between 2008 and 2011 to sometime in 2017 (although, again, the lane reopened sometime between 2012 and 2014, well before the yellowout was removed).

Maryland does something similar (half panel with white-on-green arrow for the option lane, then full two-arrow "Exit Only" at the exit) on the Outer Loop of I-495 approaching the split for I-270, incidentally, although on their signs the words "Exit Only" are stacked vertically in the right half-panel. At other locations with option lanes, such as the exit for the Cabin John Parkway (https://goo.gl/maps/mkxxipR4VDrc6h4H7), I've seen Maryland use a half-panel that just says "ONLY" rather than "Exit Only."
Title: Re: Signs using "must exit" instead of "exit only"
Post by: CovalenceSTU on May 24, 2023, 06:27:19 PM
Quote from: Henry on May 23, 2023, 11:41:05 PM
In TX and select other states, smaller "Exit Only" panels are placed over the lanes that must leave the freeway, while the option lanes get a regular white arrow indicating that traffic can stay on the freeway if they choose to instead of exiting. Here's a great example on I-45 at the I-10 exchange north of downtown Houston. (https://www.google.com/maps/@29.7721088,-95.3656117,3a,75y,336.16h,90.19t/data=!3m6!1e1!3m4!1stroL5G2Oo1-iVhdFvaOKtA!2e0!7i16384!8i8192)
I-5 in OR and WA has a lot and I like them, their meaning is obvious and they don't try to hide the option lane like the 2009 standard. I thought it was in the 2003 MUTCD until now, but I double checked and it only says to use diagrammaticals.
Title: Re: Signs using "must exit" instead of "exit only"
Post by: ran4sh on May 25, 2023, 05:24:52 PM
Quote from: CovalenceSTU on May 24, 2023, 06:27:19 PM
Quote from: Henry on May 23, 2023, 11:41:05 PM
In TX and select other states, smaller "Exit Only" panels are placed over the lanes that must leave the freeway, while the option lanes get a regular white arrow indicating that traffic can stay on the freeway if they choose to instead of exiting. Here's a great example on I-45 at the I-10 exchange north of downtown Houston. (https://www.google.com/maps/@29.7721088,-95.3656117,3a,75y,336.16h,90.19t/data=!3m6!1e1!3m4!1stroL5G2Oo1-iVhdFvaOKtA!2e0!7i16384!8i8192)
I-5 in OR and WA has a lot and I like them, their meaning is obvious and they don't try to hide the option lane like the 2009 standard. I thought it was in the 2003 MUTCD until now, but I double checked and it only says to use diagrammaticals.

In other words they were not standardized under previous MUTCDs and only in 2009 did they actually address that. I'm ok with the 2009 standards, because with the previous style of signage it often resulted in non-roadgeeks interpreting the white arrow as also being part of the exit, and therefore changing lanes to the left if trying to stay on the freeway even though they don't need to.

With the 2009 standards, if the option lane is to be emphasized then an APL can be used, if not then the above depicted MUTCD signage can be used. I don't think I would call it "hiding" the option lane because R3-8 signs and the associated pavement markings both clearly indicate it.
Title: Re: Signs using "must exit" instead of "exit only"
Post by: jakeroot on May 25, 2023, 06:51:24 PM
Quote from: CtrlAltDel on May 24, 2023, 10:48:14 AM
Quote from: jakeroot on May 24, 2023, 12:59:15 AM
Quote from: US 89 on May 24, 2023, 12:06:19 AM
Quote from: jakeroot on May 23, 2023, 10:08:46 PM
Quote from: US 89 on May 23, 2023, 08:15:18 PM
In the diagram linked above, the sign with the second "exit only" arrow comes well before the actual split.

The line showing the location of the sign on the diagram quite clearly goes off the top of the image to the split.

You're right. I didn't even notice that there - I just noticed the solid lines on the road immediately to the left of where that image is.

To be fair, the design has no place anywhere near an option lane, at the gore or earlier lol. Idiotic design, I don't know how it got into the MUTCD.

How come?

Unless there are two whole exit-only lanes from the beginning, I feel it is misleading to suddenly sign a second exit-only lane right at the gore.
Title: Re: Signs using "must exit" instead of "exit only"
Post by: jeffandnicole on May 25, 2023, 07:06:29 PM
Quote from: jakeroot on May 25, 2023, 06:51:24 PM
Quote from: CtrlAltDel on May 24, 2023, 10:48:14 AM
Quote from: jakeroot on May 24, 2023, 12:59:15 AM
Quote from: US 89 on May 24, 2023, 12:06:19 AM
Quote from: jakeroot on May 23, 2023, 10:08:46 PM
Quote from: US 89 on May 23, 2023, 08:15:18 PM
In the diagram linked above, the sign with the second "exit only" arrow comes well before the actual split.

The line showing the location of the sign on the diagram quite clearly goes off the top of the image to the split.

You're right. I didn't even notice that there - I just noticed the solid lines on the road immediately to the left of where that image is.

To be fair, the design has no place anywhere near an option lane, at the gore or earlier lol. Idiotic design, I don't know how it got into the MUTCD.

How come?

Unless there are two whole exit-only lanes from the beginning, I feel it is misleading to suddenly sign a second exit-only lane right at the gore.

I never cared for this change in the '09 MUTCD.  For the most part, I think states felt the same, as this practice of signing a second exit-only lane never really caught on too often.
Title: Re: Signs using "must exit" instead of "exit only"
Post by: US 89 on May 25, 2023, 10:18:22 PM
Quote from: jeffandnicole on May 25, 2023, 07:06:29 PM
Quote from: jakeroot on May 25, 2023, 06:51:24 PM
Quote from: CtrlAltDel on May 24, 2023, 10:48:14 AM
Quote from: jakeroot on May 24, 2023, 12:59:15 AM
Quote from: US 89 on May 24, 2023, 12:06:19 AM
Quote from: jakeroot on May 23, 2023, 10:08:46 PM
Quote from: US 89 on May 23, 2023, 08:15:18 PM
In the diagram linked above, the sign with the second "exit only" arrow comes well before the actual split.

The line showing the location of the sign on the diagram quite clearly goes off the top of the image to the split.

You're right. I didn't even notice that there - I just noticed the solid lines on the road immediately to the left of where that image is.

To be fair, the design has no place anywhere near an option lane, at the gore or earlier lol. Idiotic design, I don't know how it got into the MUTCD.

How come?

Unless there are two whole exit-only lanes from the beginning, I feel it is misleading to suddenly sign a second exit-only lane right at the gore.

I never cared for this change in the '09 MUTCD.  For the most part, I think states felt the same, as this practice of signing a second exit-only lane never really caught on too often.

The thing that bothers me more is that in the standard MUTCD signage, there is no overhead mention at all that there's an option lane. Nobody pays attention to the little white signs on the side of the road, which is understandable - usually in urban areas where option lanes are more common, these signs are stuff like "trucks prohibited in left lane", "engine brakes restricted", or "move to next exit if in accident". And this has a noticeable effect on traffic, too: people think they need to be in the far right lane in order to exit. (Because in a lot of cases, when presented with that signage, you do!) And then once they take the exit and an option lane shows up on their left, they all change back into the left lane to turn left at the light at the end of the ramp. All this extra lane changing has the effect of causing unnecessary congestion and probably results in a few more sideswipes and fender benders than you'd have otherwise.
Title: Re: Signs using "must exit" instead of "exit only"
Post by: jp the roadgeek on June 16, 2023, 04:58:03 PM
Finally got a shot of the CT 9 signage that replaces Left Lane Exit Only

(https://live.staticflickr.com/65535/52979791870_84d6a3379b.jpg)
Title: Re: Signs using "must exit" instead of "exit only"
Post by: michravera on June 16, 2023, 09:35:57 PM
Quote from: 1995hoo on May 19, 2023, 09:17:07 AM
I thought of this topic because three times in the past month, I've passed signs that use the words "MUST EXIT" in some formulation. I remember when I was growing up it seemed like Delaware preferred those words–I remember on I-295 at the US-13 interchange there were a number of signs saying either "THIS LANE MUST EXIT" (with a downward-pointing arrow) or simply "MUST EXIT." Those signs have all long since been replaced and the new signs use the now-customary "EXIT ONLY."

But last Friday I was on a southbound Acela approaching Philadelphia's 30th Street Station and I saw the following sign out the window (I didn't have my phone out and so wasn't fast enough to get a picture):
https://goo.gl/maps/RnVXSLczDYPpUEge8

Also, twice in the past month I've passed a sign on the I-495 Inner Loop in Virginia, a fairly new vertical BGS on the right side of the road as you pass through the Route 7 interchange in Tysons Corner. The sign is an advance BGS for the left-side Dulles exit and, like the sign in Philadelphia, it says "LEFT LANE MUST EXIT" (though it has the words stacked–"left lane" on one line and "must exit" on a second line underneath). I don't have any pictures because both times in the past month I was driving, traffic was reasonably heavy, and by the time I remembered the sign was there it was too late to get a picture. It's not on Google yet–their images are from October 2022 and the sign is more recent because it was posted due to construction causing changes in the lane configuration. That particular sign is interesting because the overhead signs further down the road use "EXIT ONLY."

I'm curious whether anyone has any idea how common the use of "MUST EXIT" is elsewhere. I always kind of liked that wording because I've always felt it's unambiguous. I've seen a few articles over the years in which writers have wrongly said "EXIT ONLY" means you can exit there but you can't re-enter the highway. If those people think that, surely there are others who think that as well. It's obviously an unreasonable interpretation (the interchange nearest to my house proves it), but it's still out there. "This Lane Must Exit" leaves no room for doubt what it means.




BTW, those of you who are interested in trains might take note that you can see two new Acela trainsets (not yet in passenger service) in the background of that Google Street View image if you zoom in under the BGS.

To my way of thinking, "Must Exit" is a physical requirement, whereas "Exit Only" is a regulatory requirement. This seems to be how it is used by CalTrans. I'm sure that there are exceptions. When the configuration of the road is such that the Gods make you exit "Must Exit" is appropriate. When the configuration is such that proper and orderly flow of traffic requires that you exit, "Exit Only" is appropriate.
Title: Re: Signs using "must exit" instead of "exit only"
Post by: jeffandnicole on June 16, 2023, 11:12:22 PM
Quote from: michravera on June 16, 2023, 09:35:57 PM
To my way of thinking, "Must Exit" is a physical requirement, whereas "Exit Only" is a regulatory requirement. This seems to be how it is used by CalTrans. I'm sure that there are exceptions. When the configuration of the road is such that the Gods make you exit "Must Exit" is appropriate. When the configuration is such that proper and orderly flow of traffic requires that you exit, "Exit Only" is appropriate.

How is that different though than "Left Lane Must Turn Left" and "Right Lane Must Turn Right"?  For the two to be equal, the signage should say "Left Lane Turn Only" which seems utterly nonsensical, but when 'Exit Only' signage is off on the right shoulder rather than overhead, that's the same message conveyed: https://goo.gl/maps/7UvBX2PzzjqLpdebA
Title: Re: Signs using "must exit" instead of "exit only"
Post by: bcroadguy on June 17, 2023, 06:49:11 AM
I'm not sure if this counts because they're not on BGSes but I've seen several examples of black-on-white RIGHT LANE MUST EXIT signs in California (https://www.google.com/maps/@37.6672247,-122.3951337,3a,15y,65.53h,89.59t/data=!3m6!1e1!3m4!1suujbq1dp16br-rnisbd_mw!2e0!7i16384!8i8192?entry=ttu) and Washington (https://www.google.com/maps/@47.9495665,-122.1988364,3a,15y,11.48h,89.05t/data=!3m6!1e1!3m4!1sYxJL6SyUsAHUfL3_QLnqVQ!2e0!7i16384!8i8192?entry=ttu).
Title: Re: Signs using "must exit" instead of "exit only"
Post by: jay8g on June 18, 2023, 04:19:47 AM
The white, side-mounted MUST EXIT signs are a MUTCD standard item (R3-33 (https://mutcd.fhwa.dot.gov/htm/2009r1r2r3/part2/fig2b_04_longdesc.htm)), though I prefer the design in those examples (which is similar to the more-common R3-7) to the design shown in the MUTCD.

As for why those signs have different wording from the overhead signs, I wonder if it's something about not wanting to use the word "must" on non-regulatory signs.
Title: Re: Signs using "must exit" instead of "exit only"
Post by: 1995hoo on August 07, 2023, 08:51:21 PM
Quote from: Mapmikey on May 21, 2023, 10:11:27 AM
Quote from: jeffandnicole on May 20, 2023, 03:13:06 PM

Of all the US signage, I think this is one of the most confusing phrases of language used.  "Exit Only" conveys that there's an exit, but no entrance.  To most of us, we get it what it really means.  But to most of America, especially those that don't often drive on highways or see it for the first time, the term is confusing.

There is a way to convey when that actually is the situation:  https://goo.gl/maps/HCnPEpfeJ99ACc1E7

There is GMSV of the "left lane must exit" on I-495 (https://goo.gl/maps/av6xjkXUSCZxiBGL7), which is an excellent way to convey the idea that not everybody must exit here.  I imagine in the 70s the exit only phrasing might have come about because there were still plenty of freeways/interstates with temporary endings that were heavily posted with must exit signage.

Following up here because, as noted above, that sign wasn't the one I was referring to. The sign I meant is now shown on Google Street View and here is the link. The image doesn't give a good sense for the odd shade of green (a flatter color than usual), but it certainly shows that someone at VDOT backslid into bad habits about Clearview letter height.

https://maps.app.goo.gl/WbXyALLS5c4H8hNa6?g_st=ic