I am planing a road trip from NY to LA. I did this trip 10 times already and looking for a nicest scenic road to amaze my senses and show my grandpa the beauty of this country,this is his first cross country trip ever. I have traveled around 35-40 states and took grandpa once to Grand Canyon. ( Have about 10-14 days for this trip). Before I drove on HWY'S #90,80,70,40,15.... I have Chevy Tahoe 2x4 (rear wd). By looking at the map, the HWY 94/90 from Chicago to Seattle and then #5 to San Francisco, then #1 over the ocean looks good. I don't really know how are the conditions on the roads at North US, and if there anything to see there this time of the year? Even thou I traveled many places before, it might be a good a good idea to repeat some of the roads in order to amaze my grandpa, he is 83 years old. I am professional driver, but the safer the road the better :) Please help me with any suggestions. Thank you, appreciate your time and help.