Lt. Col. Dwight D. Eisenhower’s summary report on the Transcontinental Motor Convoy, November 3, 1919, page 4

The convoy made its way west via the Lincoln Highway (now U.S. 30), passing through some 350 towns. Half of the distance traveled was over dirt roads, wheel paths, desert sands, and mountain trails. Eisenhower later said the roads they encountered “varied from average to non-existent.”

National Archives, Dwight D. Eisenhower Presidential Library and Museum, Abilene, Kansas