Signal system, interlocking plants, and automatic train control on the San Francisco-Oakland Bay Bridge railway

This paper briefly describes the nature and purpose of the various groups of railway signal and interlocking equipment operated in connection with railway service over the San Francisco-Oakland Bay Bridge. Following this description is an explanation of the method used in determining the lengths of signal blocks and calculating safe braking distances throughout the project. It is hoped that the presentation of this paper will lead to further discussion and research concerning the braking of trains of this type.