Caltrans is closing the westbound 580 bike and pedestrian path over the Richmond-San Rafael Bridge for inspection work. The three-week project began Monday, and officials say the pathway will be closed from 9 a.m. until 2 p.m. through Friday. Additional daytime work will take place during the weeks of March 2nd and March 9th. Caltrans will offer shuttle service for bicyclists and pedestrians to cross the span during project work hours. Golden Gate Transit bus service is also available.