The L.A. Transit Coalition recently posted a fascinating video tour (spotted at Curbed LA) of the Expo light rail line's Phase 2 journey through the Westside, which will takeover the old Exposition right-of-way.
Engineering work has already begun on the phase that will take riders from Culver City to Santa Monica. The video, shot earlier this month, starts west of Robertson Boulevard and goes to Pico Boulevard in West L.A., passing the 10 freeway (via tunnel), Overland Avenue, and Sepulveda Boulevard along the way. Check it out: