North of I-94, Woodward passes through New Center; this district is home to Cadillac Place, the former headquarters of GM. The neighborhoods on either side of the highway transition in composition north of New Center; this area is mostly residential in nature. Between the intersections with Webb Street/Woodland Street and Tuxedo Street/Tennyson Street, Woodward Avenue leaves the city of Detroit for the first time and crosses into Highland Park, an enclave within Detroit. It is within Highland Park that M-1 intersects M-8, the Davison Freeway. Woodward passes over the Davison, which was the first urban, depressed freeway in the US, at an interchange south of Highland Park's downtown business district. M-1 crosses that district and runs next to the historic Highland Park Ford Plant, home of the original moving assembly line used to produce Model Ts; opened in 1910, the plant's assembly line dropped the time needed to build a car from 12 hours to 93 minutes and allowed Ford to meet demand for the car.