What are the most dangerous roads / mountain passes in the lower 48

Elk in Wyoming, 4th of July in Montana, and for the love of Pete don't underestimate Parleys in Utah. But it's like the other drivers said, know your rig, chain up when necessary, and if it feels unsafe shut down. No load is more important than your life. Good luck, and know it's an important job you do.

 

That's because its narrow, if something screws up really bad and you have no place to put it shes probably going to either smash a bunch of cars or you turnover trying to get clear anywhere you can.

Resurrected aged thread. But the input is good for those not familiar with it.

Interstate mountains generally 7% give or take. Its the non interstate mountains up to 24% that seperates the living and the dead.

 

That hill heading down to laughlin nv is really steep

 

That hill going into laughlin NV is pretty #### steep.Very bottom of this 7% grade are stop lights across street from stop lights 4 crosses for each trucker who couldnt stop

 

Absolutely ive seen trucks coming down as i was heading back to vegas with smoke just billowing out if their rear brakes the worst part are those stop lights at the very bottom after you spent the last 15 mins or so smoking your rear trailer brakes

 

And its windey so that makes it even tougher

 

Don't remember the road particularly, but that trek through Telluride CO is nothing to laugh at.

 

Salt River Canyon on the us60 in AZ is a fun side show. I actually rather like it.

 

Well, I've only been driving a year and really timid with winter conditions since I have almost no experience, even in a 4 wheeler with those conditions.
That said, I drive the West so fairly regularly do Donner, Eisenhower, Tejon, Snoqualmie, Shasta, etc. Also, I drive reefer, so usually between 75k to 79k. Although at first grades scared the bejeezus out of me. Now, even with just one year of driving, they really don't bother me anymore. I just took them slow and easy. Being pushed down a hill by gravity is not fun at all. Especially when there is a turn right at the bottom of a hill, and there usually is.
I've learned how to use my engine brake well and just got lots of practice because I ended up on those routes often. I still tend to go a bit slower than other trucks. But, considering I'm almost always really heavy, that's probably appropriate anyway. I NEVER go a faster than I am comfortable or the speed limit, whichever is slower. But, I am no longer worried or anxious or tense with steep grades. Just a part of driving.
Last winter, I'd keep a good watch on weather conditions and if it looked like I might need to chain up, I'd park it or reroute myself, whichever was most feasible. Intend on doing the same thing this year. Company I drive for has a STRONG policy that the ONLY reason a driver should chain up is that they have to in order to get to the nearest safe haven. As company policy they do not want you chaining up to deliver or progress a load. Works for me!!!! My truck doesn't have a chain rack and my chains are still in their bags in my passenger side cubby. With a bit of luck and lots of weather tracking and diligence, I hope they are still in those bags when I turn my truck in someday!
Anyway, point is simply, it doesn't really take that long to get proficient and more comfortable with grades. Just don't ever push it. With experience, you'll get more comfortable and not as slow as when it is all still new.
Personally, I've learned my truck and how my engine brake works. It is kind of a balance of speed, weight, gear and engine brake. The slower I go, the lower a gear I can get myself in and the more effective my engine brake will be. I find a speed and gear where my engine brake will almost hold me and just every once and awhile have to brake to slow myself down a few MPH. Also, I make sure I'm not running my engine over 2000 RPM. If on the rare occasion I am under about 70k on weight, I can usually find a comfortable gear and speed that my engine brake will hold me without needing to use my brakes at all.