This picture was taken on my last trip to San Francisco.. I could use some help captioning this and other pictures, as I didn't take good notes when I took them, and I'm not farmiliar with the area. This photo shows a muni trolleybus negotiating a TIGHT switchback on a rather steep line. Interestingly, the trolleybuses have their own traffic signal, to allow them to use the entire intersection , curb to curb, to make the difficult turn. Evident on the retaining wall are gouges that show that not all drivers are qualified to negotiate the turn.
Photo: Andy Chier