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National Boards => General Highway Talk => Traffic Control => Topic started by: tradephoric on April 04, 2014, 02:37:31 PM

Title: Dedicated arrow for a non-dedicated turn lane
Post by: tradephoric on April 04, 2014, 02:37:31 PM
Here is an example of a 4th level right turn green arrow at an intersection.  The issue is the right lane isn't a dedicated right turn lane.  Any other examples like this out there?

https://maps.google.com/?ll=42.603695,-83.247885&spn=0.000792,0.001206&t=h&z=20&layer=c&cbll=42.603695,-83.247885&panoid=tza3cXp45UyEtZsDNLhTnw&cbp=12,34.66,,0,0
Title: Re: Dedicated arrow for a non-dedicated turn lane
Post by: jeffandnicole on April 04, 2014, 03:30:17 PM
http://goo.gl/maps/9iylY

US 30 WB, Barrington, NJ, at the intersection with Copley Rd which leads motorist to ramps for I-295.
Title: Re: Dedicated arrow for a non-dedicated turn lane
Post by: talllguy on April 04, 2014, 03:37:55 PM
Quote from: tradephoric on April 04, 2014, 02:37:31 PM
Here is an example of a 4th level right turn green arrow at an intersection.  The issue is the right lane isn't a dedicated right turn lane.  Any other examples like this out there?

https://maps.google.com/?ll=42.603695,-83.247885&spn=0.000792,0.001206&t=h&z=20&layer=c&cbll=42.603695,-83.247885&panoid=tza3cXp45UyEtZsDNLhTnw&cbp=12,34.66,,0,0

It looks like there is no turn on red though (https://www.google.com/maps/@42.603695,-83.247885,3a,15y,58.84h,86.21t/data=!3m4!1e1!3m2!1stza3cXp45UyEtZsDNLhTnw!2e0), hence the arrow maybe?
Title: Re: Dedicated arrow for a non-dedicated turn lane
Post by: getemngo on April 04, 2014, 03:59:00 PM
Michigan Street in Grand Rapids (https://www.google.com/maps/@42.970181,-85.656553,3a,75y,258.98h,79.37t/data=!3m4!1e1!3m2!1sdY5MoP44cRLITm-loMAc4A!2e0) has a few.

And here's a debatable example (https://www.google.com/maps/@42.911598,-85.548914,3a,15y,5.55h,88.49t/data=!3m4!1e1!3m2!1sqhXPbXTSr5ayzLef9zvHDA!2e0). While the far right lane is a dedicated right turn lane, the second lane is a thru/right lane. Lots of honking when the green arrow lights up and not everyone in the second lane is heading in the same direction.
Title: Re: Dedicated arrow for a non-dedicated turn lane
Post by: tradephoric on April 04, 2014, 04:15:59 PM
Quote from: getemngo on April 04, 2014, 03:59:00 PM
Michigan Street in Grand Rapids (https://www.google.com/maps/@42.970181,-85.656553,3a,75y,258.98h,79.37t/data=!3m4!1e1!3m2!1sdY5MoP44cRLITm-loMAc4A!2e0) has a few.

Good example.  Does that setup (specifically the doghouse centered over the right  lane) violate the MUTCD?
Title: Re: Dedicated arrow for a non-dedicated turn lane
Post by: getemngo on April 04, 2014, 04:43:10 PM
Quote from: tradephoric on April 04, 2014, 04:15:59 PM
Quote from: getemngo on April 04, 2014, 03:59:00 PM
Michigan Street in Grand Rapids (https://www.google.com/maps/@42.970181,-85.656553,3a,75y,258.98h,79.37t/data=!3m4!1e1!3m2!1sdY5MoP44cRLITm-loMAc4A!2e0) has a few.

Good example.  Does that setup (specifically the doghouse centered over the right  lane) violate the MUTCD?

I'm no MUTCD expert. While I can't really find anything about the far right lane being a thru/right lane, it looks like the doghouse signal shown here would be acceptable if it were a dedicated right turn lane. You're welcome to wade through Section 4D.24 yourself and figure it out.  :-P

It's interesting to note that Section 4D.21, Paragraph 5 states: "A protected only mode right-turn movement that does not begin and terminate at the same time as the adjacent through movement shall not be provided on an approach unless an exclusive right-turn lane exists." Every example in this thread so far would be classified as "protected/permissive", so it's probably technically okay... but to me, that suggests this practice isn't the best idea.
Title: Dedicated arrow for a non-dedicated turn lane
Post by: 6a on April 04, 2014, 06:41:37 PM
We have quite a good number of those. Some are like getemngo posted, where they are on a doghouse and only light up when side traffic has a protected left. Others are illuminated all the time, usually with a sign saying 'Continuous Right Turn With Caution'

(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fimg.tapatalk.com%2Fd%2F14%2F04%2F05%2Fyve9ybej.jpg&hash=23c6e10f4a7ba7f76e1e641511dc59d9d11c31b9)
Title: Re: Dedicated arrow for a non-dedicated turn lane
Post by: Brandon on April 05, 2014, 12:11:22 AM
We have a lot of these around, for left turns.  The way they work is that the side with the dedicated left turn signal goes first if a vehicle in the left lane triggers it.

Some examples:

https://maps.google.com/maps?hl=en&ll=41.537383,-88.115459&spn=0.006866,0.009645&t=m&z=17&layer=c&cbll=41.537383,-88.115459&panoid=5WmWa7X9hf8jZ8J4Fgex9Q&cbp=12,263.19,,0,-7.91

https://maps.google.com/maps?hl=en&ll=41.529655,-88.134429&spn=0.006867,0.009645&t=m&z=17&layer=c&cbll=41.529655,-88.134429&panoid=QSIIbnhJ5X_wHp_u98SKFw&cbp=12,250.91,,0,-7.61

https://maps.google.com/maps?hl=en&ll=41.551194,-88.141444&spn=0.006865,0.009645&t=m&z=17&layer=c&cbll=41.551184,-88.141551&panoid=uk5auWReLV-N12LfGMpvVw&cbp=12,286.26,,0,-6.11
Title: Re: Dedicated arrow for a non-dedicated turn lane
Post by: talllguy on April 05, 2014, 12:26:25 PM
Here is one at W Towsontown Blvd @ Osler Dr (https://www.google.com/maps/@39.395618,-76.615596,3a,65.7y,108.93h,80.15t/data=!3m4!1e1!3m2!1sP50FEL0LY3w0j_6rl92_3Q!2e0) in Towson, MD. Here is another at Kenilworth Ave @ Bosley Ave (https://www.google.com/maps/@39.406018,-76.608359,3a,89.9y,112.75h,67.73t/data=!3m4!1e1!3m2!1swr5rwXlU3pLO649GgpQxlg!2e0) in Towson, MD. Interestingly, the Kenilworth one uses a doghouse, and although this is a T intersection, there are no pavement markings indicating movements. I'd say most people use the right lane for turns though.
Title: Re: Dedicated arrow for a non-dedicated turn lane
Post by: 1995hoo on April 05, 2014, 12:48:00 PM
Quote from: getemngo on April 04, 2014, 03:59:00 PM
Michigan Street in Grand Rapids (https://www.google.com/maps/@42.970181,-85.656553,3a,75y,258.98h,79.37t/data=!3m4!1e1!3m2!1sdY5MoP44cRLITm-loMAc4A!2e0) has a few.

And here's a debatable example (https://www.google.com/maps/@42.911598,-85.548914,3a,15y,5.55h,88.49t/data=!3m4!1e1!3m2!1sqhXPbXTSr5ayzLef9zvHDA!2e0). While the far right lane is a dedicated right turn lane, the second lane is a thru/right lane. Lots of honking when the green arrow lights up and not everyone in the second lane is heading in the same direction.

Posting via iPad, so I don't know of a way to give you a Street View link. Look up eastbound Constitution Avenue at 18th Street NW in Washington, DC. Similar situation to what you describe, except it's a left turn.....also, lots of people illegally go straight from the left-only lane, so if you turn from the option lane, you run a serious risk of being in a crash. The other thing that happens is the straight-thru traffic has a green when the left-turning traffic has a red arrow. Heaven help you if you stop in the option lane to obey the red arrow because you want to go left when thru traffic has that green.

I'm sure I've posted a Street View of that at some point in the past.
Title: Re: Dedicated arrow for a non-dedicated turn lane
Post by: talllguy on April 05, 2014, 10:47:40 PM
Just spotted another one of these at the end of the ramp for I-95 in Baltimore to Key Highway. Southbound Exit 55. Ahead is E McComas Street, which runs underneath I-95 for a few blocks. Drivers in the right lane that do not turn may get some angry honks. However there is another ramp back to I-95 SB just beyond the light, so there could definitely be some traffic going straight (like me in this case).

(https://farm8.staticflickr.com/7341/13656374385_4523944983_c.jpg) (https://flic.kr/p/mNLujM)
Title: Re: Dedicated arrow for a non-dedicated turn lane
Post by: 1995hoo on April 06, 2014, 11:14:14 AM
Following on my earlier comment, here is the DC intersection I mentioned. The roads have been repaved and the pavement markings are clearer now than when the Google car went through, but the configuration is the same. Note the red arrow for left-turning traffic.

http://goo.gl/maps/9hrzg
Title: Re: Dedicated arrow for a non-dedicated turn lane
Post by: busman_49 on September 24, 2014, 01:31:07 PM
Columbus, OH, has a fair number of examples of this...the one at the forefront of my mind is SB Hamilton Rd at Refugee Rd...
http://goo.gl/maps/faVAa

The right turn arrow comes on only when EB Refugee Rd gets their left turn arrow, so it's pretty pointless.
Title: Re: Dedicated arrow for a non-dedicated turn lane
Post by: DaBigE on September 24, 2014, 02:04:43 PM
Madison, WI (https://www.google.com/maps?ll=43.067657,-89.401197&spn=0.000004,0.004128&t=m&z=19&layer=c&cbll=43.06766,-89.401307&panoid=IqQTyBenUEJjSNUoRJGSKw&cbp=12,92.27,,0,18.25) has at least one of the left turn variety.
Title: Re: Dedicated arrow for a non-dedicated turn lane
Post by: countysigns on September 24, 2014, 06:43:46 PM
http://tinyurl.com/lhkp2x5

Here is one at the corner of Monroe Street (OH-51) and Central Avenue (OH-120) in West Toledo.
Title: Re: Dedicated arrow for a non-dedicated turn lane
Post by: kj3400 on September 24, 2014, 08:24:05 PM
There's a couple of examples in Baltimore I can think of.
This one is on Reisterstown Rd (MD 140) and Liberty Heights Av (MD 26) at Mondawmin Mall: http://goo.gl/maps/ifbyP

This one also on Liberty Heights Av, this time at Gwynn Oak Av. Both signals have arrows, but none have marked lanes for them: http://goo.gl/maps/RR8re

Just up the road at Rogers Av. There used to be another one for eastbound traffic, but they removed it: http://goo.gl/maps/cFxf1
Title: Re: Dedicated arrow for a non-dedicated turn lane
Post by: Big John on September 25, 2014, 12:45:54 PM
Green Bay: https://www.google.com/maps/@44.5310158,-88.0628721,3a,75y,285.54h,77.45t/data=!3m4!1e1!3m2!1sugDpN2Hu_r_MbiUl2rty9g!2e0
Title: Re: Dedicated arrow for a non-dedicated turn lane
Post by: Ian on September 25, 2014, 03:15:10 PM
One that I can think of right off the bat is PA 926 (Street Road) at Shady Grove Way (https://maps.google.com/maps?hl=en&ll=39.942137,-75.528131&spn=0.008505,0.018818&t=h&z=16&layer=c&cbll=39.942086,-75.528229&panoid=4gE1stPJ2-3iT3rnyBxjLg&cbp=12,54.29,,0,4) near West Chester, PA.
Title: Re: Dedicated arrow for a non-dedicated turn lane
Post by: jakeroot on September 25, 2014, 05:28:40 PM
Bridgeport @ I-5 in Lakewood, Washington (both intersections on either side of the interchange):

(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FGtxApf1.png&hash=abed4a9c473d178196a878733509d7f003fca14b)
Title: Re: Dedicated arrow for a non-dedicated turn lane
Post by: cl94 on September 25, 2014, 11:22:17 PM
Buffalo, just east of I-90 Exit 52 on Walden Avenue (https://www.google.com/maps/@42.9088407,-78.7614608,3a,75y,280.24h,74.22t/data=!3m4!1e1!3m2!1s-dXKg0tb0dXyBhXtAESb-g!2e0)