Rules, standards and instruction for installation, inspection, maintenance, and repair of automatic block signal systems, interlocking traffic control systems, automatic train stop, train control and cab signal systems
Subtitle: Effective March 31, 1966
Publisher: U.S. Govt. Print. Off.
Published: 1966
Place of publication: Washington
Language: eng
Number of pages: 84
Notes: At head of title: Ex parte no. 171.