A no-injury collision occurred on northbound stage Highway 1 at the Serramonte Boulevard offramp at 7:44 a.m. Wednesday.

The eastbound N-Judah line was delayed at Carl and Cole streets due to a door issue at 7:16 a.m. The train was taken out of service.

The Powell cable car line was down at 7:07 a.m., with shuttle buses providing supplemental service.

The Muni 9-San Bruno, 29-Sunset and 71-Haight/Noriega lines had longer than usual wait times at 6:57 a.m.