highways.dot.gov

yVZ6p TIL the Lincoln Highway (1910s) made driving across America easier. However, muddy or flooded roads were expected and drivers needed camping gear. The road guide included tips for each town. E.g. Fish Springs, Utah travelers could "build a sagebrush fire" for a local team to find/rescue them.
woK77 TIL that Asphalt is a byproduct of processing crude oil for petroleum.