It is illegal to ride bicycles on interstate highways.
Background information (if available):
Sec. 39-13. Pedestrians, bicycles, etc., prohibited on certain interstate highways. It shall be unlawful and an offense against the city for pedestrians to be upon, or for any person to operate a bicycle, a nonmotorized vehicle or a motor driven cycle of less than ten (10) horsepower, on any part of Interstate Highway 10 and Interstate Highway 65, including the entrance roads thereto, at any place within the city and its police jurisdiction. (Code 1965, § 41-26.1)