Extremes of advisory signs

[Some_Person]

There are various different advisory signs, such as ones warning of a slight curve, or one warning of a sharp turn coming up. Most of these have advisory speeds posted somewhere on the sign, so I made this thread for the extremes of those speeds. (and signs, in some cases.)

For example, here's a really low speed for a freeway ramp: http://goo.gl/maps/ueI7e

And although this is only the first post of the thread, I don't believe you can find a lower advisory speed than this: http://goo.gl/maps/OVB4u

Share any interesting ones you find!

[kphoger]

That's awesome!  I'd never seen an advisory 5 mph before.

[agentsteel53]

advisory 3 at the Lebec truck weigh station on I-5 southbound (just after the 5/99 merge, and before the Grapevine).

http://goo.gl/maps/Frj8t

I believe I have seen 2 and 1 as well, in similar contexts.

[Kacie Jane]

It's an on-ramp instead of an off-ramp, but I'd imagine this would be the lowest advisory speed for a freeway ramp. The Goog

Good candidate for the poor sign placement thread, too.

[mapman1071]

AZ 89A Thru Jerome
The Switchbacks have A 10mph Advisory

[kphoger]

Are there any examples of advisory speed tabs with a speed greater than 65 mph?

[andrewkbrown]

Here's another 5mph sign, from my hometown.
http://goo.gl/maps/bhoxf

[NE2]

Are there any examples of advisory speed tabs with a speed greater than 65 mph?

https://www.aaroads.com/forum/index.php?topic=7969.msg182069#msg182069

[Mapmikey]

There are a couple of posted 70 mph curves on interstates in Texas though after criss-crossing the state in January I don't remember where exactly.

Virginia also has posted 5 mph curves.  one is northwest of Luray on SR 675 crossing the mountain to Fort Valley.  No GMSV.

Mapmikey

[1995hoo]

....

Virginia also has posted 5 mph curves.  one is northwest of Luray on SR 675 crossing the mountain to Fort Valley.  No GMSV.

Mapmikey

Another is on the Snickersville Turnpike (Route 734, I believe) in Bluemont where it makes a hairpin turn just south of VA-7. Don't know if there's a Street View since I don't have access to it just now.

[cpzilliacus]

....

Virginia also has posted 5 mph curves.  one is northwest of Luray on SR 675 crossing the mountain to Fort Valley.  No GMSV.

Mapmikey

Another is on the Snickersville Turnpike (Route 734, I believe) in Bluemont where it makes a hairpin turn just south of VA-7. Don't know if there's a Street View since I don't have access to it just now.

It's 734.

I had forgotten about that one (I've been out that way, but not for a few years).

The 5 MPH advisory  sign on westbound Va. 734 is here.

The actual hairpin turn is here.

The one for eastbound Va. 734 (though traffic is headed compass west as it passes this sign) is here.  This one has the  "look" of a pretty old VDOT classic sign (I don't think that they install this style any longer).

There's even an advance warning of the hairpin turn after entering Va. 734 from Va. 7 (Harry Byrd Highway) here.

[jeffandnicole]

I-76 East, Exit 349 - 10 mph FROM the highway.  It's a sharp right turn. http://goo.gl/maps/6R5y5

I believe I-76 West, Exit 350, also now has a 10 mph advisory speed, and that's an otherwise normal cloverleaf exit.

[KEK Inc.]

I'm surprised noone referenced the Arroyo Seco Pkwy (CA-110) yet.  Speed limit is 55.

http://goo.gl/maps/KxWnM

http://goo.gl/maps/1nqna

http://goo.gl/maps/GRqCy

http://goo.gl/maps/4R4Gg



Not nearly as bad as CA-110, but this does show CalTrans' brilliant engineering.

http://goo.gl/maps/khVUm

While the advisory sign is 5x faster than the ones on Arroyo Seco, it's still a 70 zone (so a 90 zone since it's California).  Technically, you have to cut the gore to barely make that exit. 

[agentsteel53]

http://goo.gl/maps/khVUm

there's something really unintuitive about the striping of that ramp approach.  (5N to 152W)  I can't put my finger on it; all I know is that I'm always caught by surprise at 'whoa, I have to merge over another lane'.  Any traffic engineers have some actual data to help figure this out?

[1995hoo]

....

Virginia also has posted 5 mph curves.  one is northwest of Luray on SR 675 crossing the mountain to Fort Valley.  No GMSV.

Mapmikey

Another is on the Snickersville Turnpike (Route 734, I believe) in Bluemont where it makes a hairpin turn just south of VA-7. Don't know if there's a Street View since I don't have access to it just now.

It's 734.

I had forgotten about that one (I've been out that way, but not for a few years).

The 5 MPH advisory  sign on westbound Va. 734 is here.

The actual hairpin turn is here.

The one for eastbound Va. 734 (though traffic is headed compass west as it passes this sign) is here.  This one has the  "look" of a pretty old VDOT classic sign (I don't think that they install this style any longer).

There's even an advance warning of the hairpin turn after entering Va. 734 from Va. 7 (Harry Byrd Highway) here.

Yeah, I haven't been that way in a few years either, and I've only used that road going eastbound. The times I've used it have been on the way home from the golf course at Virginia National on the other side of the mountain there when I've wanted to go a way other than the Dulles Greenway. Never used it westbound because it takes too long when you need to get out there at a specific time. Nice drive, though. I recall there being signs on Route 7 warning truck drivers to use an alternate route through Bluemont, presumably because the hairpin is much too sharp.

A road that could do with 5-mph curve warning signs, and possibly some sort of device to stop traffic while vehicles going the other way take the turn, is Sulfur Springs Road (Route 606) northwest of Clifton Forge, Virginia; it's the back route over the mountain from Clifton Forge to Hot Springs (the Homestead Resort). The switchbacks are so sharp that you pretty much have to go around in the outside lane even if that means using the "wrong side of the road," as if you try to use the inside lane the bottom of your car will get all scraped up (and the gouges in the pavement attest to it). I don't recall any advisory signs for most of the turns because the road doesn't really get all that huge an amount of traffic. We went that way en route to the Homestead a few years back because a friend who lives in Clifton Forge suggested I'd enjoy that road. She was right....I enjoyed it the one time and now feel no need to go that way again. You have to be extremely careful at the switchbacks in case someone's coming the other way. It shaves 13 miles off compared to taking I-64 to Covington and then US-220 north, but it takes longer despite the shorter distance. Unfortunately I have no pictures of that road and there's no Street View.

[Some_Person]

Are there any examples of advisory speed tabs with a speed greater than 65 mph?

I've read of advisory speeds of 75mph in Oklahoma, in a PikePass lane if I remember correctly. I couldn't find any clear streetview of it however.

In Eastern PA there's this sign, http://goo.gl/maps/HlQDY which has a 50mph curve on a 2 lane road(PA 329/987) with a 55 mph speed limit. So far, 50 mph on a curve on a two lane road is the highest advisory sign of that type that I've seen.

[formulanone]

US 377 in Texas has a couple 65 mph advisory curve signs; most of the route has a 70 mph limit. There's also a few 25 and 35 mph curves.

[colinstu]

stumbled across another very slow sign... 5mph!

http://goo.gl/maps/SbQC3

and a little east later too http://goo.gl/maps/1Jg9v

[The High Plains Traveler]

Since this thread has been exhumed, this is I-25 south of Pueblo. It's a 75 mph zone.
http://goo.gl/maps/h9NtV

[agentsteel53]

I feel like I've seen 70 on a two-laner in Texas which has a speed limit of 75.  maybe 62/180?

[Scott5114]

I've read of advisory speeds of 75mph in Oklahoma, in a PikePass lane if I remember correctly. I couldn't find any clear streetview of it however.

Here you go (H.E. Bailey Norman Spur near its western terminus):
https://maps.google.com/?ll=35.210243,-97.690982&spn=0.001858,0.003227&t=m&z=19&layer=c&cbll=35.210264,-97.691144&panoid=zqMragiXhf0M8tb2ocD9gA&cbp=12,276.87,,0,1.56

You also get the wonderful 75 MPH advisory with a 65 MPH regulatory here. Lay off the drugs, OTA.

[US71]

I feel like I've seen 70 on a two-laner in Texas which has a speed limit of 75.  maybe 62/180?

I travel to Canton, TX every Memorial Day weekend. TX 19 is 70mph and 2 lanes

[1995hoo]

I've read of advisory speeds of 75mph in Oklahoma, in a PikePass lane if I remember correctly. I couldn't find any clear streetview of it however.

Here you go (H.E. Bailey Norman Spur near its western terminus):
https://maps.google.com/?ll=35.210243,-97.690982&spn=0.001858,0.003227&t=m&z=19&layer=c&cbll=35.210264,-97.691144&panoid=zqMragiXhf0M8tb2ocD9gA&cbp=12,276.87,,0,1.56

You also get the wonderful 75 MPH advisory with a 65 MPH regulatory here. Lay off the drugs, OTA.

I think that's the only time I've ever seen the ETC lanes exit to the right and the cash-payers continue straight through. Every time I've encountered toll plazas that have highway-speed ETC lanes, it's the cash-payers who exit to the right. I can certainly see how doing it this way is less expensive if they're just adding highway-speed ETC lanes to an existing toll plaza, of course. Is this configuration common out west?

[Scott5114]

OTA is inconsistent with it. The Will Rogers and Turner have the usual ETC-on-left setup. I think H.E. Bailey has ETC-on-right, but it's not open-road tolling.

[roadman]

I've read of advisory speeds of 75mph in Oklahoma, in a PikePass lane if I remember correctly. I couldn't find any clear streetview of it however.

Here you go (H.E. Bailey Norman Spur near its western terminus):
https://maps.google.com/?ll=35.210243,-97.690982&spn=0.001858,0.003227&t=m&z=19&layer=c&cbll=35.210264,-97.691144&panoid=zqMragiXhf0M8tb2ocD9gA&cbp=12,276.87,,0,1.56

You also get the wonderful 75 MPH advisory with a 65 MPH regulatory here. Lay off the drugs, OTA.

I think that's the only time I've ever seen the ETC lanes exit to the right and the cash-payers continue straight through. Every time I've encountered toll plazas that have highway-speed ETC lanes, it's the cash-payers who exit to the right. I can certainly see how doing it this way is less expensive if they're just adding highway-speed ETC lanes to an existing toll plaza, of course. Is this configuration common out west?

And what's with the gazillion sand barrels protecting the overhead sign uprights?  Seems to me guardrail would be much more effective (and less expensive to boot).