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I-470 in Ohio and West Virginia (the Wheeling Bypass) has three steep grades. If you drive it eastbound, you have a moderate descent for about six miles, and then you cross the Ohio River into West Virginia and have a steep, curvy ascent for two miles, followed by a steep, straight descent for two miles before merging back onto I-70 east of Wheeling.
The Siskiyou Pass in Oregon going south on I-5 to California is the steepest. Put the car in neutral and fly down to Redding at 100 MPH - just watch out for OHP/CHP.
The Siskiyou Pass in Oregon going south on I-5 to California is the steepest. Put the car in neutral and fly down to Redding at 100 MPH - just watch out for OHP/CHP.
OSP you mean? There is no OHP...
But yep. Siskiyou Pass is easy peasy. I mean... It is the steepest, but it's not that bad. It's a freeway, after all.
Highway 101 in Ventura county in California has a dangerously steep grade. While traveling the P.C.H. in 2007, I happened upon this incredibly steep decline ... I thought I was going to pass out!
It's a total "nosebleed" hill ... anybody with "vertigo" had best avoid this particular stretch of highway.
I rode my brakes the entire way down this grade.
Does anyone happen to know? I've been searching online to try to find out but I've yet to come up with a conclusive answer.
I'm guessing I-84 in Oregon coming down/up Emigrant Hill...but I'm not sure. I think that one is at around 7% or so...which seems lower than what I'd assume the maximum would be, but IDK.
Anyone know the answer?
Technically there may be steeper Interstates, but your original guess is a good one. I-84 in Northeast Oregon (Emigrant Hill, just east of Pendleton) is one of the most magnificent stretches of 6% grade in the US. Multiple lane, multiple emergency truck escapes (westbound), is a great example of steep freeway construction in the U.S. Totally rebuilt in the 90's, this is Interstate freeway at its best. If you have a pulse, this drive will raise it, especially westbound coming down the hill.
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