Highest speed limit that you have seen while on the road.

[oscar]

My breakdown:

Toll freeway: 85mph (southern part of TX 130 toll road)
Interstate or other freeway: 80mph (multiple freeways in Mountain/Great Plains states)
Divided non-freeway: 75mph (multiple US and state highways in west and south Texas)
2-lane: 75mph (at least one US highway in east Texas)

As you might guess, Texas is my favorite state for driving.

[SSOWorld]

for the writer:

Freeway: 80 in Texas and Utah
at-grade multi-lane with median: 65 many locations
at-grade multi-lane with center turn lane: 60 Arkansas
2-lane: 75 in Texas, with a side of speed traps

[sprjus4]

My breakdown -

Freeway / Interstate - 85 MPH, TX-130
Four-Lane At-Grade with Intersections - 75 MPH, U.S. 77, U.S. 59, U.S. 281, TX-35, TX-290, etc.
2-Lane Roadway - 75 MPH, U.S. 59, TX-35, FM 2678, US-83, etc.

The beauty is how wide open Texas is, there's not an interstate everywhere. But you get some pretty damn high speeds (mostly 70, a lot also 75) almost anywhere in Texas to get where you're going, two lane, four-lane, freeway, etc.

[US 89]

Since we're breaking this down:

Interstate/freeway: 80 mph, various rural Interstates
Non-interstate freeway: 70 mph, US 20 in Idaho
Divided highway: 75 mph, US 84 in Texas
2-lane highway: 70 mph, various highways in Texas

[roadman65]

My breakdown -

Freeway / Interstate - 85 MPH, TX-130
Four-Lane At-Grade with Intersections - 75 MPH, U.S. 77, U.S. 59, U.S. 281, TX-35, TX-290, etc.
2-Lane Roadway - 75 MPH, U.S. 59, TX-35, FM 2678, US-83, etc.

The beauty is how wide open Texas is, there's not an interstate everywhere. But you get some pretty damn high speeds (mostly 70, a lot also 75) almost anywhere in Texas to get where you're going, two lane, four-lane, freeway, etc.

Texas don't discriminate.

75 mph is the highest I have encountered driving, but only on freeways.  70 on both non freeways 2 and 4 lane roads, and both in the Lone Star State.

[doorknob60]

If we're gonna break it out:

Interstate: 80 (various in ID, UT, MT)
Non-Interstate Freeway: 70 (various, including US-95 and US-20 in ID, parts of US-395 in WA, and parts of CA-99)
Divided Expressway with at-grades: 70 (parts of US-395 in WA, probably more)
2 Lane Highway: 70 (US-95 in OR, US-20 in ID, various in NV and MT)

Bonus:
Non state maintained road: 65 (Clark County 215 in Las Vegas)
Non state maintained, non-freeway: 60 (Addison Ave East of Twin Falls, ID)

[kphoger]

OK, fine, I'll do it too.

Undivided highway:  75 mph
Divided surface highway:  75 mph
Freeway:  85 mph

[Buck87]

Freeway: 75 (various western states)
Divided Expressway with at-grades: 70 (US 30 in Ohio)
2 Lane Highway: 65 (various western states)

[Rothman]

80 in Utah and Texas.

[webny99]

I have been on I-90 across South Dakota, which has a speed limit of 80 mph.

Funny, all the mentions of TX-130 and its 85 mph limit, but I thought I-10 and I-20 also had an 85 mph limit in western Texas.

[hotdogPi]

Funny, all the mentions of TX-130 and its 85 mph limit, but I thought I-10 and I-20 also had an 85 mph limit in western Texas.

Welcome back!

They're at 80 mph.

[Kulerage]

70 mph is what I remember, but I have have been on a road with 75 before.

[Flint1979]

I have been on I-90 across South Dakota, which has a speed limit of 80 mph.

Funny, all the mentions of TX-130 and its 85 mph limit, but I thought I-10 and I-20 also had an 85 mph limit in western Texas.

I-10 and 20 are 80 mph in western Texas. Oddly enough Michigan's max speed is now 75 mph and the closest state with a speed limit that high or higher is Arkansas. South Dakota is 80 mph but North Dakota is 75 mph seems like it'd be the same to me.

[sprjus4]

I have been on I-90 across South Dakota, which has a speed limit of 80 mph.

Funny, all the mentions of TX-130 and its 85 mph limit, but I thought I-10 and I-20 also had an 85 mph limit in western Texas.

I-10 and 20 are 80 mph in western Texas. Oddly enough Michigan's max speed is now 75 mph and the closest state with a speed limit that high or higher is Arkansas. South Dakota is 80 mph but North Dakota is 75 mph seems like it'd be the same to me.

West Virginia is currently going through legislation to increase their's to 75 MPH. North Carolina tried for 75 MPH about five years ago though didn't pass fully, though could happen again the future.

[bmorrill]

I've been on sections of the German Autobahn that have no speed limit at all.

When I drove the Autobahn in the '60s, there was only one section (near Stuttgart) where I even SAW a speed limit. About 100 klicks as I recall due to the hilly terrain and narrow lanes.

[debragga]

Freeway: 85 mph
Divided highway: 75 mph
Multi-lane highway with a center turn lane: 75 mph
2-lane road: 75 mph

All in Texas

[X99]

80 on the Interstate almost all the way across the state, but I've been on no-limit autobahns too (not the driver, I was too young at the time). My dad said his average speed on a no-limit autobahn was 100 mph. For everyone saying 100 kph is the highest they've ever seen, it's not. 100 kph translates to about 62 mph.

[webny99]

For everyone saying 100 kph is the highest they've ever seen, it's not. 100 kph translates to about 62 mph.

100 is the highest number many people have seen on a speed limit sign.

[1995hoo]

I've never seen "kph" anywhere because there's no such thing.

[X99]

For everyone saying 100 kph is the highest they've ever seen, it's not. 100 kph translates to about 62 mph.

100 is the highest number many people have seen on a speed limit sign.

The thread title is highest speed limit, not highest number.

[1995hoo]

For everyone saying 100 kph is the highest they've ever seen, it's not. 100 kph translates to about 62 mph.

100 is the highest number many people have seen on a speed limit sign.

The thread title is highest speed limit, not highest number.

Who cares? Who said you get to dictate how people are allowed to respond?

[bing101]

70-75 MPH for me though.

[CNGL-Leudimin]

For everyone saying 100 kph is the highest they've ever seen, it's not. 100 kph translates to about 62 mph.

100 is the highest number many people have seen on a speed limit sign.

I've seen 130 by myself. 120 is the highest number I regularly see (75 mph in your units).

[Rothman]

Heh.  By that standard, I have seen 120, too.

[kphoger]

I've never seen "kph" anywhere because there's no such thing.

They're my initials.