Two morning trips and two afternoon trips will be added starting Monday to the RapidRide C Line serving West Seattle, so a bus appears every eight or nine minutes at the busiest times.
King County Metro Transit is responding to crowding and rider complaints last week, when the C Line replaced Route 54, while a few nearby routes were reduced.
Buses routinely carried 75 to 100 people, and some were so full that transit drivers passed waiting commuters.
“Higher-than-expected ridership demand emerged…during the peak commute times,” Metro said. There were “hundreds” more daily trips in West Seattle than when Metro tallied ridership in the spring, the agency said.
Metro will also seek traffic-signal changes to give buses an advantage at intersections.