The 1920s auto dealership district and Route 66 traffic
Broadway Avenue between NE 4th and NE 10th Streets became Oklahoma City's primary automobile commercial corridor in the 1910s, as automotive ownership exploded in the United States and the new auto industry created concentrated commercial districts wherever local market conditions supported them. By the early 1920s, the Broadway corridor in OKC contained over 50 auto dealerships representing essentially every American automotive brand — Ford, Chevrolet, Buick, Dodge, Chrysler, Cadillac, Lincoln, Studebaker, Pierce-Arrow, Hudson, Packard, and dozens more.
When federal Route 66 was officially designated in 1926, the new highway was routed through Oklahoma City along Broadway Avenue — directly through the heart of Automobile Alley. The convergence of an already-thriving auto commercial district with the brand-new transcontinental highway created an extraordinary commercial concentration: Route 66 traffic from Chicago and points east flowed directly past dozens of car dealerships, gas stations, repair shops, and supporting businesses along Broadway. The district peaked in commercial activity from roughly 1926 through 1956.
The construction of Interstate 40 through the 1950s and 1960s gradually shifted Route 66 traffic off Broadway onto the interstate, and the automobile commercial district shifted along with it — to suburban locations along the I-40 corridor and other peripheral OKC commercial strips. By the late 1960s, most of the original Automobile Alley dealerships had moved or closed. The architectural buildings remained in place but were repurposed for warehouse uses, light industrial uses, or simply sat vacant through the 1970s and 1980s as downtown OKC hollowed out.