Its north end is at the Ecorse Junction/River Rouge area, where it meets the Conrail Junction Yard Secondary and Norfolk Southern Railway Detroit District.
[4] The PRR began building the line, but construction stopped in 1918 because of World War I and the takeover of the national rail system by the United States Railroad Administration.
[5] On May 23, 1920, the PRR began operating passenger trains between Toledo and Detroit, using trackage rights over the Ann Arbor Railroad from the end of PRR trackage near Galena Street[6] in Toledo to Alexis, the Pere Marquette Railway (now CSX Toledo Terminal Subdivision and Saginaw Subdivision) from Alexis past Carleton to Romulus, the Wabash Railway (now NS Detroit District) from Romulus via Ecorse to Delray, and the Detroit Union Railroad Depot and Station Company (now CSX Detroit Subdivision) to the Fort Street Union Depot.
[7] Work on the Pennsylvania–Detroit Railroad, between Carleton and Ecorse, resumed and was completed in 1922;[8] the PRR leased it on January 1, 1923.
[9] The P-D merged into the Pennsylvania, Ohio and Detroit Railroad, a PRR subsidiary, on January 1, 1926.