"Plans for the autobahn date to the 1920's. Construction of the first segment (Cologne-Bonn) began in 1929 and was dedicated by Mayor Konrad Adenauer of Cologne on August 6, 1932. When Adolph Hitler assumed power as Chancellor of the Third Reich in 1933, he took the program over, claiming it for his own."

"Hitler's autobahn construction began in September 1933 under the direction of chief engineer Fritz Todt. The 14-mile expressway between Frankfurt and Darmstadt, which opened on May 19, 1935, was the first section completed under Hitler." https://www.fhwa.dot.gov/infrastructure/reichs.cfm

"Hitler's autobahn construction began in September 1933 under the direction of chief engineer Fritz Todt. The 14-mile expressway between Frankfurt and Darmstadt, which opened on May 19, 1935, was the first section completed under Hitler." https://www.fhwa.dot.gov/infrastructure/reichs.cfm