>> President Eisenhower is widely regarded as the catalyst for the IHS. His motivations for a highway network stemmed from three events: his assignment as a military observer to the First Transcontinental Motor Convoy, his experience in World War II where he observed the efficiencies of the German autobahn, and the Soviet Union's 1953 detonation of the hydrogen bomb, which instigated a fear that insufficient roads would keep Americans from being able to escape a nuclear disaster.
https://www.army.mil/article/198095/dwight_d_eisenhower_and_...
>> President Eisenhower is widely regarded as the catalyst for the IHS. His motivations for a highway network stemmed from three events: his assignment as a military observer to the First Transcontinental Motor Convoy, his experience in World War II where he observed the efficiencies of the German autobahn, and the Soviet Union's 1953 detonation of the hydrogen bomb, which instigated a fear that insufficient roads would keep Americans from being able to escape a nuclear disaster.