Forty-four people were hospitalized this afternoon after a San Francisco Municipal Railway light rail vehicle rear-ended another light rail vehicle at the city’s West Portal Station, an agency spokesman said. The collision occurred just before 3 p.m. when a L-Taraval train rear-ended a K-Ingleside train that was stopped on the outbound platform of the West Portal Station, Muni spokesman Judson True said. Three people, including the operator of the L-Taraval, suffered serious injuries. Forty-one others were transported to hospitals with minor to moderate injuries, True said. The people with minor injuries were transported to area hospitals in a Muni bus, a procedure standard for emergencies such as a major collision, according to San Francisco fire Lt. Ken Smith. “The most complicated part is making sure everyone is accounted for, and the people with the most serious injuries are taken care of and transported in a timely fashion,” Smith said. Smith said 68 personnel from the San Francisco Fire Department responded, as well as 15 ambulances, seven fire engines, one fire truck and a number of battalion chiefs and other personnel. True said the collision remains under investigation, and added that he did not know the speed of the L-Taraval train at the time of the crash. Muni light rail service between the West Portal and Castro stations remained halted at about 5 p.m. due to the collision, according to the transit agency’s Web site. Buses are providing substitute transportation between the West Portal and Castro stations, and West Portal Station and western destinations for the K/T, L and M lines, True said.