Maintenance Standards

Procedures and requirements in these documents outline facilities’ maintenance and operational needs.

Track Maintenance and Safety Standards

• Blue, Orange, and Red Lines (2005)
• Green Line (2007)

Communications and Signal Department

• C&S 1: Instructions for Testing Signal Apparatus and Signal Systems (2016)
• C&S 2: Special Instructions Governing Construction and Maintenance of Signals and Interlockings (2015)

Signals Maintenance

• SM.1: Instructions for Testing Signal Apparatus and Signal Systems: Light & Heavy Rail Transit (2015)
• SM.2: Special Rules, Standards, and Instructions Governing Construction and Maintenance of Signals and Interlocking (2015)