Downgrades east of the Mississippi that really get your attention

There is a huge mountainous road just south of Coraopolis, Pa that if you do it once you’ll never, ever again.
Only time I’ve seen sign “Trucks use lowest gear, recommended weight 5 tons” me at 80000 just leaving a plant with liquid, around Carnegie and Bridgeville.
Stop sign at bottom, left turn takes you back to 376 around Green Tree

 

You provided me with 6 seperate targets is this the one you are speaking of? This road after a left goes to 376, if you looked to the right you are looking at the river

Google Maps

 

There is one here in the Ozarks at the Oklahoma/Arkansas line about halfway up, has a 5 mph restriction for that curve.

The problem is that it's a set of little 10 foot highway portable concrete barriers at the edge of that curve because people punch through it as they go over and fall 1000 feet or so. If that 5mph sign does not get you, the solid black all out braking straight clean off the edge of that pavement into the big wide sky will.

I took it at 3. Now I need a bourbon of something \_/ whee. that's fun. No coffee needed for sure.

 

You won't even know your engine brake is on while in low range on a 12% grade.

 

The elevation change of a grade like that is equivalent to the west end of the Eisenhower Tunnel down to Idaho Springs, only in the course of 3 miles. It’s roughly a 4000 foot elevation gain or loss.

The road down into Waipio Valley on the Big Island is 24% and even though it’s paved it’s still 4wd only.

 

You just know it's a screwed up place when they give a place an Idaho name in Colorado.

 

Nope! And none west of the Mississippi either. When I was an active driver I was a professional driver. I knew how to operate a CMV and took the proper precautions when on these mtns or mtn passes. I will say this however. The one area back east that always bothered me was I 40 in the gorge. At the Tenn/NC state line the area where I-40 was placed is not geologically stable. I have had small rocks to bust my windshield going through this area several times. One day hopefully they will abandon this road and route I-40 a different way. This is one of many examples of where local politicians said if you want a road it goes through here. I-85 does this at the Ga/SC border. Go look up who was the Governor of Georgia at this time and where he was from. I 85 was built about 10 miles off center and almost goes through the then Governor's hometown of Lavonia.

 

It’s been a few years, the hill there looked about like it, used to be a stop sign, cross traffic didn’t stop, wasn’t any buildings there either

 

And considering the highest point in Vermont is just over 4k feet.....

 

The most dangerous grades are the ones of medium % as no one slows on them and if something happens their going too fast to stop

 

Yep. It amazes me how the vast majority of drivers will go down a hill at the highest speed they can with their brakes just barely holding them back. They are literally on the edge of runaway truck state.

Guess it shouldn't surprise me, considering how most drivers run down flat roads with no where near enough space to come to an emergency stop if needed.