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Author Topic: Road's that keep the same speed limit for their entire length  (Read 810 times)

cl94

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Re: Road's that keep the same speed limit for their entire length
« Reply #25 on: September 12, 2019, 10:46:41 PM »

Under normal conditions, I-270 OH is 65 MPH for its entire length.

In New York...
- I-290, 587, 590, 787, 790, 890 are all 55 for their entire length
- I-695 and 878 are 50 for their entire length
- NY 198 and 470 are entirely 30 MPH
- NY 236 and 278 are entirely 45 MPH
- NY 135 and 421 are entirely 55 MPH
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Revive 755

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Re: Road's that keep the same speed limit for their entire length
« Reply #26 on: September 12, 2019, 10:50:59 PM »

Some though I cannot remember if they drop at one or both of the ends:

Illinois
* I-172 (70 mph)?
* IL 255 (65 mph)

Indiana
* I-465 (55 mph)?  (Is just an advisory speed posted or is there an actual drop at the I-865 interchange?

Kentucky
* I-264 (55 mph)?

Missouri
* MO 370 (60 mph)?
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vdeane

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Re: Road's that keep the same speed limit for their entire length
« Reply #27 on: September 13, 2019, 12:41:54 PM »

Under normal conditions, I-270 OH is 65 MPH for its entire length.

In New York...
- I-290, 587, 590, 787, 790, 890 are all 55 for their entire length
- I-695 and 878 are 50 for their entire length
- NY 198 and 470 are entirely 30 MPH
- NY 236 and 278 are entirely 45 MPH
- NY 135 and 421 are entirely 55 MPH
I-481, NY's part of I-99, and the currently designated portions of eastern I-86 are all 65 their entire length.
I-790 is 65 where it runs parallel to I-90, so it doesn't count for this thread.
NY 840 is 55 its entire length.
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webny99

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Re: Road's that keep the same speed limit for their entire length
« Reply #28 on: September 13, 2019, 12:58:30 PM »

NY 531 is close, but I don't think it counts. And what about NY 400?

There are not many examples of any significant length in NY (excluding I-86, which is hopefully a short- or at least only medium-term example). Many of PA's urban/suburban freeways would probably qualify, though, as they're guaranteed not to exceed 55 mph: I-279(?), I-283, PA 283, PA 581. PA 33 notably switches from 55 to 65 halfway through, while I-380 may now be 70 mph for it's entire length (?).
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corco

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Re: Road's that keep the same speed limit for their entire length
« Reply #29 on: September 13, 2019, 01:02:17 PM »

Interstate 184 is 60 MPH its entire length, though the roadway drops to 45 after it transitions to US 20/26

vdeane

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Re: Road's that keep the same speed limit for their entire length
« Reply #30 on: September 13, 2019, 01:21:22 PM »

NY 531 is close, but I don't think it counts. And what about NY 400?
NY 531 drops to 55 at either end.  NY 400 also drops to 55 for a mile at its northern end, and drops to 55 and then 40 southbound approaching its southern end.

Quote
There are not many examples of any significant length in NY (excluding I-86, which is hopefully a short- or at least only medium-term example). Many of PA's urban/suburban freeways would probably qualify, though, as they're guaranteed not to exceed 55 mph: I-279(?), I-283, PA 283, PA 581. PA 33 notably switches from 55 to 65 halfway through, while I-380 may now be 70 mph for it's entire length (?).
Note that I-380 has an (IMO pointless) overlap with I-84 that is posted at 55.  Even on the portion that doesn't have an overlap, it drops to 55 approaching I-84.
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1995hoo

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Re: Road's that keep the same speed limit for their entire length
« Reply #31 on: September 13, 2019, 03:31:15 PM »

^^^^

To the second category, I’d add that I-495’s general-purpose lanes are posted at 55 mph all the way through Virginia (and Maryland too), but the HO/T lanes are posted at 65 for their whole length.
Also, isn't the "Dulles Toll Road" portion of VA-267 posted consistently at 55 mph? I know the "Dulles Greenway" portion is 65 mph, but none on the "Dulles Toll Road" IIRC.

The Toll Road's speed limit drops to 35 mph in advance of the main toll plaza in both directions. I don't know whether that would disqualify it for purposes of this thread. As a more general matter, I kind of assumed the OP probably wouldn't count the road because I assumed VA-267 as a whole would be what would count, even though most of us in Northern Virginia distinguish between the two portions as if they're separate roads. Or even really three portions, for that matter—those of us who have lived here long enough sometimes view the portion east of Route 123 as being separate from the rest. When it opened in 1985, it was usually called the Dulles Access Road Extension. The traffic reporters nowadays tend to call it the "Dulles Connector Road." I know plenty of newer area residents consider that segment part of the "Dulles Toll Road," but that's inaccurate because there's no toll to use it (apart from any I-66 HO/T toll one might have to pay going to or from the road). I know the Toll Road opened before the Access Road Extension, but I don't know which one was planned first (forum member "Beltway" probably knows).

I do remember when I-66 inside the Beltway opened right before Christmas in 1982, the Washington Post had an article about how when the then-planned Exit 20 (as it was then numbered) opened, the "Dulles Access Road Extension" combined with I-66's HOV exemption for Dulles traffic would present a "bonanza" for the "Dulles Access Highway Outlaws," those being the people who illegally drove to the airport and turned around in an effort to beat the traffic. (Bear in mind that when I-66 opened, the restriction was HOV-4, so there was almost nobody on the road during rush hour.)
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Flint1979

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Re: Road's that keep the same speed limit for their entire length
« Reply #32 on: September 13, 2019, 08:29:53 PM »

It's easy for an interstate I think. The road I used in the OP is a more local I believe it would fall under a county road  but we don't have county roads in this part of Michigan.
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Thunderbyrd316

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Re: Road's that keep the same speed limit for their entire length
« Reply #33 on: October 11, 2019, 01:05:57 AM »

I-86 in Idaho with 80 mph for 63 miles would be another.
[/quote]

The speed limit on I-86 drops to 65 through the Pocatello metro area.
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crispy93

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Re: Road's that keep the same speed limit for their entire length
« Reply #34 on: October 15, 2019, 09:11:49 PM »

I wanted to say the Taconic State Parkway is 55 its whole length (even in Westchester, ugh) but it does drop to 50 at the Saw Mill and becomes a surface road.

The Sprain and Palisades are 55 the whole way. The FDR Drive is 40. The Cross Island and Belt are 50. Most of the LI parkways are 55 the whole way (the Southern State drops to 50 at the Cross Island).

Putnam County: NY 403 is short, 45 the whole way.
Westchester: NY 132, 40 the whole way.
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