San Francisco Bay Toll-Bridge CompanyDate from ancillary map: "based upon 1926 official census ..."; Includes chart comparing routes and ancillary map: Traffic density chart.; On verso: [General view of the San Francisco Bay area and the Sacramento and San Joaquin Valleys].19 x 20 centimeters, on sheet 36 x 43 centimeters, folded to 36 x 22 centimetersJPEGUMN_ALMA:9960095660001701engThe Company? (San Francisco?)PublicSan Francisco Bay Toll-Bridge Company comparative route mapMapsCalifornia--San FranciscoCalifornia1926University of Minnesota