olddesertrider wrote:
6% grades are common in the western U.S. i40 and U.S. 93 and SR68 are traveled on a constant basis by all manner of big rig trucks and RVs. Just make sure your trailer brake system is functioning properly, start downgrades at a slower speed and use the tow haul mode of the transmission or downshift the trans yourself to avoid riding the brakes constantly on the downhills. Slow your speed gain with strong braking periodically and let the brakes cool in between applications. It is 32 miles from Kingman to Laughlin by 93/68 and approx 90 miles to Laughlin via i40 and Needles then north to Bullhead City. Seems a useless waste of fuel and vehicle mileage to avoid a route which is traveled by all manner of RVs, constantly, as I stated above. Just slow down, it is all 4 lane highway on 93/68 so faster vehicles can pass you.
IMHO, this is the correct answer. We are in Laughlin / Bullhead City all the time, and there's no reason to go the long way around through Needles when coming in on I40 from the East.