Prior to parkway construction, nine roads and two rail lines crossed the Arroyo Seco and its valley on bridges, and a number of new bridges were built as part of the project. Only four of the existing bridges were kept, albeit with some changes: the 1925 Avenue 26 Bridge, the 1926 Avenue 60 Bridge, the 1895 Santa Fe Arroyo Seco Railroad Bridge (now part of the L Line) near Avenue 64, and the 1912 York Boulevard Bridge. The Avenue 43 Bridge would have been kept had the Los Angeles Flood of 1938 not destroyed it. At Cypress Avenue, abutments and a foundation were built for a roadway, but were not used until the 1960s, when a pedestrian bridge was built as part of the Golden State Freeway (I-5) interchange project. In South Pasadena, seven streets and the Union Pacific and Santa Fe railroad lines on a double track combined bridge were carried over the parkway to keep the communities on each side connected.