Yea I had a problem. I wanted to see the tunnel in daylight (the whole reason for taking I70) and it was aproaching darkness before getting to the tunnel. So had to spend a night at over 7,000 feet altitude. The other person I was with did not sleep well at such a high altitude, with such thin air. But he did OK, and we had a great time.
There is not a "No Propane" restriction, like found on certain tunnels that go under water, or are back east where they panic about things like a small propane tank on a RV. However I don't think they allow certain trucks through the tunnel, such as fuel tankers, and somehow I don't think you will be driving a commercial truck.
There are actually two tunnels. If you are westbound you use the Eisenhower Tunnel. If eastbound you use the Johnson Tunnel.
If traveling from Denver west you will have several relative short grades to handle. The first is when you get to the foothills. The Virginia Canyon climb is about 5 miles at 5 to 6%. Floyd Hill is a couple miles of climbing and a 3 mile 6% downgrade. The next is Georgetown Hill whick is a couple miles long.
The last mile to the tunnels is steep plus you are at about 11,000 ft. You leave the tunnels at 11,158 ft. and have a 8 mile downhill with parts at 7%. A couple of miles of climbing between Silverthorne and Frisco and then you have Vail Pass. A 4 mile climb from the Copper Mountain Resort. The summit is 10,666 ft and 8 miles of downhill 6/7% grades to Vail and that is all of the big hills going west.
Often sleeping problems at altitude can be helped by being properly hydrated. Limit alcohol and caffeine. Drink extra water. And it is not just drinking water that day. Start drinking extra water a couple of days before you get to the higher altitudes.
the only issue we've ever had at the tunnel was the height of the RV. this occurred back in the mid 80's.
we were EB on I-70 and as we approached the tunnel we were waived over to the side. the fellow said we had tripped the 'height detector' coming up the grade. our class A ('85 winnebago chieftain) at the time was 10'-something inches and when i pointed that out that we were significantly shorter than the semis moving past us he said he could clearly see that but "rules was rules".
the only thing i could figure was that my ham antennas which were attached to the trucker-style mirrors had somehow tripped the detector. he gave me a choice...remove the antennas or be re-routed onto a bypass which would have added many, many miles to the trip. easy choice.
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