i had to carry around the rail physical danger was in the earlier shots which were made by peter stockwell who made quite a name for himself in the early stages of the steel erection. and he made some spectacular scenes from the cables, cat walk and the tower places looking down some 300 feet to the ferry boats below. >> reporter: the work continued six months ahead of schedule the bridge was finished in november of 1936. the upper deck was six lanes of two way traffic. the lower deck reserved for trucks and commuter trains. the bay bridge is the most beautiful bring -- beautiful bridge in the world. it's six or seven different kind of bridges. a tunnel, a suspension bridge, 8-1/2 miles long. from yerba buena island to the center pier on the oakland's side is 109 feet longer than the span of the golden gate. >> reporter: beauty does seem to rest more comfortably in the eye of the beholding. >>> when we come back on a second look. the key system providing transit in the east bay and across the bridge to san francisco. >>> how an efficient an extensive urban transit system disappeared. a bit