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Author Topic: Route numbers that could be speed limits  (Read 10717 times)

doorknob60

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Re: Route numbers that could be speed limits
« Reply #25 on: January 29, 2015, 03:23:39 AM »

Oregon:
No 75-95

You could almost argue that US-95 could work. There's a few places where 95 is way way too fast (Jordan Valley and Rome, to name a couple), but for large sections of it, it's probably doable.

US81

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Re: Route numbers that could be speed limits
« Reply #26 on: January 29, 2015, 05:56:09 AM »

Texas list, 30 to 75

30 - none found (except I-30 frontage roads, which I don't think should count)
SH 35
BI 40-D
BI 45-J (these BIs were my last resorts)
FM 50
SH 55
FM 60
SH 65 (most of it)
US 70
US 75
Bonus: SH 130 is posted at 80mph for most of its length, which would be 130km/h if we used metric.

A few more TX candidates:

TX (SH) 30 - College Station to Huntsville. A little slow for most of it.
FM 40 - Lubbock-area. Having never driven but only judging from a random sampling of GSV, looks a little slow.
TX (SH) 45 (access roads along Toll 45) - Austin-area. Just about right.
US 80 - Dallas (Mesquite) to LA. Too fast for all but a couple of short stretches.
« Last Edit: January 31, 2015, 11:42:29 AM by US81 »
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Bickendan

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Re: Route numbers that could be speed limits
« Reply #27 on: January 29, 2015, 10:45:10 AM »

Oregon:
No 75-95

You could almost argue that US-95 could work. There's a few places where 95 is way way too fast (Jordan Valley and Rome, to name a couple), but for large sections of it, it's probably doable.
Why'd I miss US 95 x.x
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Eth

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Re: Route numbers that could be speed limits
« Reply #28 on: January 29, 2015, 05:47:47 PM »

For Georgia:

I-20 - definitely not
GA 20 - could be somewhat plausible in a couple towns, but still slow for a state highway
US 25 - perhaps through some towns
GA 25 - likewise
GA 30 - certainly through towns (Americus, Cordele, etc.)
GA 35 - certainly through towns (Thomasville, Tifton, etc.)
GA 40 - quite plausible, especially for the eastern third of the route
GA 45 - a largely rural route in SW Georgia; might be a bit slow in parts, but certainly doable
GA 50 - yeah, that could work
GA 55 - great!
GA 60 - could work on some stretches south of Dahlonega. Too many mountains north of there.
GA 65 - yep, except for the east end in Pelham (if GA allowed this on 2-lane roads, anyway)

GA 70 - unlikely on what is largely a suburban route
I-75 - south of Macon, sure (if GA's maximum weren't 70, at least)
GA 75 - mountains all the way, so nope
US 80 - the Columbus freeway bypass has too many curves, and nothing else would qualify
GA 80 - rural, but not an expressway and not straight, so no
I-85 - maybe? Pushing it, but not completely insane. (Outside the Atlanta area, obviously.)
GA 90 - much like GA 80, but longer, so another no
I-95 - too much traffic for that
GA 95 - no way
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Re: Route numbers that could be speed limits
« Reply #29 on: January 30, 2015, 04:23:37 AM »

When I first saw this I thought 88 on I 88 on the Illinois Tollway portion - that's reality. But since I cant use it because it's not divisible by 5, How about 55 on I-55?
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SkyPesos

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Re: Route numbers that could be speed limits
« Reply #30 on: February 17, 2021, 11:13:36 PM »

Old thread, but since Ohio haven't been done yet, I'll contribute

US 20: could work in downtown Cleveland (currently signed at 25), but besides that niche use, nope
OH 25: works for the numerous downtowns it passes through, but otherwise, nope
US 30: it's mostly a freeway or expressway in the state, so nope
US 35: like US 30, mostly freeway, so nope
US 40: works for within urban areas like in Columbus, but in rural areas, too slow
OH 45: mostly a yes
US 50: besides the concurrency with OH 32, yes, 50 could work on 50
OH 55: mostly a rural 2 lane on a relatively straight route, so 55 is perfect, and most likely what is already signed on it
OH 60: no expressway sections, so maximum posted speed is 55. Though there are probably some flat and straight sections where you can drive at 60
OH 65: no expressway sections, so too fast
I-70: maximum posted speed limit in Ohio is 70, which is what is signed on most of I-70
I-75: the speed almost every person drives at on I-75, despite the lower posted speed limit
I-80: too high to be posted, though traffic does flow at 80 in rural sections sometimes
OH 85:  :rofl:
I-90: too high, though I wouldn't be surprised if there at least 3 people out there that drives 90 on 90


« Last Edit: February 17, 2021, 11:28:15 PM by SkyPesos »
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Crown Victoria

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Re: Route numbers that could be speed limits
« Reply #31 on: February 17, 2021, 11:58:38 PM »

Since no one did PA years ago...

US 20: too slow, except maybe in Erie
PA 25: is the speed limit in Hegins, and could be the truck speed limit on downhill stretches between there and Newtown, Schuylkill County (not to be confused with the one in Bucks County)
US 30: definitely along the Main Line and in Philly
PA 35: most likely in any of the small villages it travels through
US 40: in more populated areas, yes
PA 45: definitely closer to its termini
PA 50: definitely
PA 55: does not exist currently
PA 60: not since I-376 took over its freeway segments
PA 65: it's a possibility
I-70: once the free segments are reconstructed, definitely (except in Breezewood); Turnpike segment is posted at 70
PA 75: too fast
I-80: many travel this fast anyway, so why not?
PA 85: nope
I-90: some travel this fast, but probably not the best idea, especially during lake effect
I-95: too fast (although some do it anyway)
PA 100: too fast mph, could work in many places kph
« Last Edit: February 18, 2021, 12:14:33 AM by Crown Victoria »
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TheHighwayMan394

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Re: Route numbers that could be speed limits
« Reply #32 on: February 18, 2021, 12:00:56 AM »

US 10, MN 15, MN 20 - Too slow.

MN 25 - Has a lot of sharp turns in the route, so at times this is reasonable.

MN 30, I-35 - Too slow.

MN 40 - Probably has some in-town segments.

MN 45 - Reasonable. This route is only two miles long anyway.  :biggrin:

MN 50 - Reasonable.

MN 55 - Perfect.

MN 60 - Probably perfect as well - does have some flat, rural segments and quite a bit of expressway upgrading these days.

MN 65 - Posted 65 north of the Twin Cities to Cambridge as 4-lane expressway.

MN 70, US 75, MN 80, I-90, MN 95 - Too fast.

Could probably update this.

MN 30 - many 30 segments through towns
I-35 - 35 minimum limit on I-35E at the Mississippi River bridge
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bing101

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Re: Route numbers that could be speed limits
« Reply #33 on: February 18, 2021, 12:10:59 AM »

Unfortunately, Californiaís major north-south artery (I-5) would be one of the most excruciating drives on earth. Itís miserable enough at 70. (Although at times in LA, 5 m.p.h. would be an improvement.)

CA 35 (Skyline Boulevard) would be rather slow but close to reasonable.
I-40 - way too slow
CA 45 - also slow, but closer to tolerable
US 50 - a bit slow for the freeway in Sacramento, a bit fast for some of the mountainous stretches in El Dorado County.
CA 55 (Costa Mesa Freeway) - close to normal
CA 60 (Pomona Freeway) - close to normal
CA 65 - close to normal
CA 70 - too fast for much of this route
CA 75 - pushing it
I-80 - close to actual speeds during low-traffic periods; too fast for Donner pass
CA 85 - pushing it
Good one.
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US 89

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Re: Route numbers that could be speed limits
« Reply #34 on: February 18, 2021, 12:17:00 AM »

Utah:

5: does not exist
SR 10: too slow
I-15: haha
SR 20: does not pass through any towns, none of the mountain segments are that bad
SR 25: see 20
SR 30: section through Logan
SR 35: segments through Francis and maybe Hanna and/or Tabiona
US 40: several sections in/near towns including Heber, Duchesne, Roosevelt, Vernal
SR 45: would be reasonable around Naples, but the actual limits skip 45
US 50: edges of several towns it passes through, actually posted 50 near Scipio and Salina
SR 55: too fast - business loop with quite a bit of activity
SR 60: too fast - windy suburban/exurban road
SR 65: could work east of Big Mountain Pass, but I think the actual road is posted 55 or 60 instead thanks to mountains
I-70: a couple of mountain sections
SR 75: too fast - exurban surface connector road
I-80: over half its route in Utah
SR 85: too fast - suburban/exurban expressway with a 65mph limit ... but that doesn't stop some people
SR 90+: no
« Last Edit: February 18, 2021, 05:07:25 PM by US 89 »
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Ketchup99

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Re: Route numbers that could be speed limits
« Reply #35 on: February 18, 2021, 01:04:34 AM »

Pennsylvania:
5 - too slow
10 - too slow
15 - too slow
20 - too slow
25 - reasonable in some of the towns like Millersburg
30 - reasonable in towns like Gettysburg
35 - reasonable in McAlisterville
40 - reasonable in Chalkhill (but a little slow), quite reasonable in Brownsville
45 - exists in my town! Reasonable in many places through central PA
50 - curvy, somewhat developed, reasonable on much of it.
55 - doesn't exist.
60 - on old Route 60 (now I-376) it would be fine. As it is, too fast.
65 - some of it is four lane divided, rural, reasonable
70 - reasonable on most of I-70 in PA
75 - super rural, through the middle of nowhere. Reasonable.
80 - bet your bottom dollar, I-80 should be 80mph in PA.
85 - unfortunately, too fast.
90 - I guess they could get away with it in the most rural portions... 90 is certainly a fine speed, whether it's a reasonable limit is subjective.
95 - no.
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bulldog1979

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Re: Route numbers that could be speed limits
« Reply #36 on: February 18, 2021, 01:07:33 AM »

Michigan:

M-20 - not the speed limit, but there's probably some sections that can only go that fast
M-25 - maybe in Bay City, or somewhere in a small-town speed-trap
M-30 - likely in some small sections
M-35, M-40, M-45 - very probably
M-50 - maybe
M-55 - most of it
M-60, M-65, M-70 - no way - although M-65 was, back before Nixon's 55
I-75 - I wish
M-80, M-85, M-90, M-95 - again, no way


Since posting, significant sections of I-75 have been posted at 75 mph since 2017.
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DandyDan

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Re: Route numbers that could be speed limits
« Reply #37 on: February 18, 2021, 04:36:33 AM »

Iowa:

US-20 - not a chance.
IA-25 - doesn't look like it hits any city centers directly, so probably not.
US-30 - maybe once or twice in a western town that it hasn't bypassed yet.
I-35 - hell no.
IA-40 - doesn't exist
IA-45 - doesn't exist
IA-50 - doesn't exist
IA-55 - doesn't exist (man, they're pretty inconsistent with route numbers)
IA-60 - Reasonable. AFAIK, it's an expressway with speed limit 65 for its entire length. Even if it's not, it's very reasonable to do 60 on any given Iowa* 2-lane road.
US-65 - I'm pretty sure 65 is its speed limit between Des Moines and the IA-330 split. Other than that, it's still pretty reasonable.
IA-70 - if you feel ballsy. It's relatively straight, but there might be a few hills here and there and it's only two lanes.
US-75 - again, if you feel ballsy. You could probably get away with it on the freeway/expressway segment.
I-80 - "80 on 80" is a thing.
IA-85 - that part of the state is a bit too hilly to be doing 85 on a country road.


Anything above that is pretty unreasonable in general, and IA-90 and IA-95 don't exist.
25 is the speed limit for IA 25 in Guthrie Center, where there is a 4 way stop at IA 44. I imagine other towns on the route have a 25 mph limit.
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Great Lakes Roads

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Re: Route numbers that could be speed limits
« Reply #38 on: February 18, 2021, 03:38:16 PM »

Let's do Illinois:

IL 5- no, unless it's rush hour in the Quad Cities
IL 10- no
IL 15- heck no
US 20- maybe in some slow spots like Marengo for example
IL 25- yes in some cities and towns
US 30- yes through some small towns
IL 35- definite yes
US/IL 40- yes through some small towns
US 45- yes in some spots through Chicagoland
IL 50- perfect speed limit for some sections that are busy within the Chicagoland region
I-55- yes in major cities like Chicago and STL, but no outside of those areas
IL 60- perfect for a speed limit increase on two-lane roads, but it's going to be a no since it runs through Lake County
IL 65- none
I/IL 70- perfect for I-70, but for the state route, no
IL 75- don't even think about it!
I-80- heck yes!
IL 85- none
I/IL 90- yes for I-90 on the Chicago Skyway and the tollway, but it's going to be a no for the state route
IL 95- no, no, no
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kphoger

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Re: Route numbers that could be speed limits
« Reply #39 on: February 18, 2021, 03:41:04 PM »

Let's do Illinois:

I sometimes had to look twice to figure out which of these was the speed limit.  White rectangles look too much like white rectangles.
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SkyPesos

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Re: Route numbers that could be speed limits
« Reply #40 on: February 18, 2021, 03:49:23 PM »

Let's do Illinois:

IL 5- no, unless it's rush hour in the Quad Cities
IL 10- no
IL 15- heck no
US 20- maybe in some slow spots like Marengo for example
IL 25- yes in some cities and towns
US 30- yes through some small towns
IL 35- definite yes
US/IL 40- yes through some small towns
US 45- yes in some spots through Chicagoland
IL 50- perfect speed limit for some sections that are busy within the Chicagoland region
I-55- yes in major cities like Chicago and STL, but no outside of those areas
IL 60- perfect for a speed limit increase on two-lane roads, but it's going to be a no since it runs through Lake County
IL 65- none
I/IL 70- perfect for I-70, but for the state route, no
IL 75- don't even think about it!
I-80- heck yes!
IL 85- none
I/IL 90- yes for I-90 on the Chicago Skyway and the tollway, but it's going to be a no for the state route
IL 95- no, no, no
US 50? Iím guessing itís a bit low considering 2 lane rural roads are generally signed at 55 already.

Not sure if I should nitpick on US 60 for IL, considering itís like a mile long in the state.
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Great Lakes Roads

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Re: Route numbers that could be speed limits
« Reply #41 on: February 18, 2021, 03:52:07 PM »

Let's do Illinois:

IL 5- no, unless it's rush hour in the Quad Cities
IL 10- no
IL 15- heck no
US 20- maybe in some slow spots like Marengo for example
IL 25- yes in some cities and towns
US 30- yes through some small towns
IL 35- definite yes
US/IL 40- yes through some small towns
US 45- yes in some spots through Chicagoland
IL 50- perfect speed limit for some sections that are busy within the Chicagoland region
I-55- yes in major cities like Chicago and STL, but no outside of those areas
IL 60- perfect for a speed limit increase on two-lane roads, but it's going to be a no since it runs through Lake County
IL 65- none
I/IL 70- perfect for I-70, but for the state route, no
IL 75- don't even think about it!
I-80- heck yes!
IL 85- none
I/IL 90- yes for I-90 on the Chicago Skyway and the tollway, but it's going to be a no for the state route
IL 95- no, no, no
US 50? Iím guessing itís a bit low considering 2 lane rural roads are generally signed at 55 already.
Whoops, forgot about US 50! I would say it's too slow for some sections, but there are some spots that are perfect for US 50.
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cabiness42

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Re: Route numbers that could be speed limits
« Reply #42 on: February 18, 2021, 03:59:12 PM »

Indiana

US 40 - In most towns it passes through this is the speed limit.
I-70 - The speed limit is 70 already.
I-80 - could probably handle these speeds.
I-90 - 90 is considered reckless driving in IN.
US 50- 50 would be a bit slow. Most of it is 55 mph.
US 30- Way too slow.
I-65- The speed limit for trucks.

IN 25 has a speed limit of 25 in Logansport and possibly other places
US 35 has a speed limit of 35 in LaPorte and likely many other places
IN 45 has a speed limit of 45 in Bloomington and likely other places
US 50 goes from 55->45 on both ends of Seymour so 50 could be a speed limit there
IN 55 has the vast majority at 55
IN 60 is not four lanes so not eligible to be 60 in Indiana
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kphoger

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Re: Route numbers that could be speed limits
« Reply #43 on: February 18, 2021, 03:59:50 PM »

Whoops, forgot about US 50! I would say it's too slow for some sections, but there are some spots that are perfect for US 50.

Found one!

50 mph on US-50
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Re: Route numbers that could be speed limits
« Reply #44 on: February 18, 2021, 04:12:36 PM »

Washington:

I-5: Traffic jams will do it (or an opening on the Interstate Bridge)
SR 10: Not necessary, given how remote it is
SR 15: Does not exist
SR 20: Probable for some of the small town centers it passes through, or the approaches to the ferry queues
SR 25: Doesn't pass through any town centers, but the speed limit would be appropriate for the Candian border.
SR 30: No longer exists
SR 35: The new Hood River Bridge is expected to have a 35 mph speed limit, so this is perfect
SR 40/45/50/55/60/65/70/75/80/85: Does not exist
I-90: Possible in some stretches, but not recommended

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Re: Route numbers that could be speed limits
« Reply #45 on: February 18, 2021, 05:56:41 PM »

North Carolina:

NC 5:  Much too slow for something that rural.
NC 10:  Rather slow, though maybe if you're stuck behind a truck climbing the mountains?  Better for some of the more-decayed parts of Old NC 10 from when it used to be the cross-state highway.
US 15:  Sure, when you're stuck in traffic around Chapel Hill.
NC 20:  Maybe in the heart of some small towns, I guess.
NC 25:  Doesn't exist
NC 30:  Still on the slow side.  Greenville hasn't gotten out that far yet.
NC 35:  Okay, when you're in a small town.
I-40:  This'd be an improvement at rush hour!
NC 45:  Sounds good.
NC 50:  Sounds great on the eastern part; sounds much too fast around Raleigh.
NC 55:  Perfect for some of the new bypasses.
NC 60:  Much too fast for that mountain road.
NC 65:  Suburban, but still too fast.
US 70:  Perfect for the freeway parts.
NC 75:  Nope, it's too suburban.
NC 80:  Ouch goes the mountain road.
I-85:  Great!
NC 90:  Says Wikipedia, "It is one of the few highways in the state with an unpaved portion."
NC 95:  Does not exist.
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Re: Route numbers that could be speed limits
« Reply #46 on: February 18, 2021, 11:17:11 PM »

Michigan:

M-20 - not the speed limit, but there's probably some sections that can only go that fast
M-25 - maybe in Bay City, or somewhere in a small-town speed-trap
M-30 - likely in some small sections
M-35, M-40, M-45 - very probably
M-50 - maybe
M-55 - most of it
M-60, M-65, M-70 - no way - although M-65 was, back before Nixon's 55
I-75 - I wish
M-80, M-85, M-90, M-95 - again, no way


Since posting, significant sections of I-75 have been posted at 75 mph since 2017.
Also, M-70 doesn't exist and I think parts of M-65 might be posted at 65 mph
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Re: Route numbers that could be speed limits
« Reply #47 on: February 18, 2021, 11:36:34 PM »

Let's do Illinois:

IL 5- no, unless it's rush hour in the Quad Cities
IL 10- no
IL 15- heck no
US 20- maybe in some slow spots like Marengo for example
IL 25- yes in some cities and towns
US 30- yes through some small towns
IL 35- definite yes
US/IL 40- yes through some small towns
US 45- yes in some spots through Chicagoland
IL 50- perfect speed limit for some sections that are busy within the Chicagoland region
I-55- yes in major cities like Chicago and STL, but no outside of those areas
IL 60- perfect for a speed limit increase on two-lane roads, but it's going to be a no since it runs through Lake County
IL 65- none
I/IL 70- perfect for I-70, but for the state route, no
IL 75- don't even think about it!
I-80- heck yes!
IL 85- none
I/IL 90- yes for I-90 on the Chicago Skyway and the tollway, but it's going to be a no for the state route
IL 95- no, no, no
US 45 can and does have some 45 MPH Zones outside of Chicagoland, as it makes its way south thru eastern Central and Southern Illinois, generally along the I-57/I-24 Corridor towards Metropolis and Brookport and the Ohio River

US 50 has already been addressed

US 60: That would upset Cairo/Alexander County Police/ISP District 22, and probably be a bit high, especially for those 2 older bridges. US 60 in Illinois is basically the Illinois side of the Mississippi and Ohio River Bridges, and a 3-way intersection, with US 51 at the southern tip of the state, where US 51 NB/US 60/62 WB is Stop-sign controlled

I-70: I think 70 MPH is a bit slow for most of the route in IL, but that is a personal opinion

IL 100:   :bigass:

The Sum/Total for the I-39/US 51 Duplex of 90 is completely appropriate for most of that Freeway! When on the Jane Addams Tollway and it is the the US 51/I-39/90 Triplex east of Rockford, the Sum/Total of 180 is probably a bit high. Southeast of Rockford, the Sum/Total of the US 20/51/I-39 Triplex of 110 MPH is high, also. 110 km/h could work, tho (SkyPesos pointed that out for IL 110/CKC also). Interestingly, the Sum/Total of the US 51/I-55/74 Triplex around Bloomington/Normal, IL is also 180, but again, a bit too high

Parts of IL 110/CKC would be doable at 110 MPH, but still would probably be signed a bit high. Especially the parts along I-88, I-74, and I-172 *could maybe* get away with it. The OP does put a limit on anything above 100, anyway
« Last Edit: February 19, 2021, 09:28:18 AM by ilpt4u »
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SkyPesos

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Re: Route numbers that could be speed limits
« Reply #48 on: February 18, 2021, 11:44:23 PM »

Parts of IL 110/CKC would be doable at 110 MPH, but still would probably be signed a bit high. Especially the parts along I-88, I-74, and I-172 *could maybe* get away with it
If it's km/h, the number 110 on IL 110 would be perfect!
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ilpt4u

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Re: Route numbers that could be speed limits
« Reply #49 on: February 18, 2021, 11:47:09 PM »

Parts of IL 110/CKC would be doable at 110 MPH, but still would probably be signed a bit high. Especially the parts along I-88, I-74, and I-172 *could maybe* get away with it
If it's km/h, the number 110 on IL 110 would be perfect!
110 km/h is about 69 MPH - that would even be fine on much of the 110/336 and 110/US 67 Expressway duplexes thru Western IL, tbh
« Last Edit: February 18, 2021, 11:49:21 PM by ilpt4u »
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