skipnchar wrote:
Interstate highways have the same grade standard in the Rockies as in the rest of the country. 06% is the grade standard to allow relatively easy access to commercial trucking. There are very FEW exceptions where this is exceeded, and then only for a short distance. State highways may be as steep as 08% and be within standards though 6 and 7 are MUCH more common. You would pretty much have to go LOOKING for grades steeper than 8% though they are out there but not on major roads.
Good luck / Skip
Skip. Depends on what you consider a main road. The main road between Little Switzerland, and Marion NC, 226A. Has 14.9, and 15.7 degree grades. The main road between Cherokee, and Maggie Valley NC has 9.
Around here. The interstates, are the flattest roads
