Detroit was built on a radial route design and all of the commercial horse car and electric trolley development by DUR and its predecessor companies was on the radial roads. Getting crosstown was a bitch. Hazen Pingree got some crosstown streetcars [[later bought by DUR) but they weren't optimal. When the auto came along, crosstown traffic was a real problem leading to the Davison Expressway development and later to the priority given to the Edsel Ford Expressway [[I-94).
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