Directives
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View design manuals, guidelines, and maintenance standards for work on MBTA projects.
- Asset Information Delivery Design Directive (February 2024)
- Stair Construction Materials and Design Directive (May 2023)
- Commuter Rail ROW Access Design Directive (April 2023)
- Conduit Seals Directive (February 2023)
- Wire Insulation Design Directive (January 2023)
- Pier Protection and Safety Walls Design Directive (January 2023)
- Bus Transit Traffic Signals Design Directive (November 2022)
- Rail Weld Clearances to Bond Wire Connections and Holes Directive (October 2022)
- Lighting Levels and Fixtures Design Directive (September 2022)
- Railroad Operations Construction Policy Directive (September 2022)
- Process Water Supply Directive (July 2022)
- Busway Design Criteria (April 2022)
- Structural Decks Design Directive (April 2022)
- Hi-Rail Vehicle Derailment Requirements (April 2022)
- Life Safety System Code Compliance Design (April 2022)
- Mobile Crane Requirements (October 2021)
- Bicycle Parking (August 2021)
- Bonded Insulated Joints for Transit Trackwork (August 2021)
- Bus Stop (August 2021)
- Construction Monitoring Programs (August 2021)
- Exit Signs (August 2021)
- Final Track Geometry Tolerance Inspections (August 2021)
- Restraining Rail Fasteners (August 2021)
- Track Expansion Joints (August 2021)
- Track Shimming (August 2021)
- Bathroom Fixtures and Finishes (June 2021)
- Retaining Wall (April 2021)
- Code and Regulation Variances (December 2020)
- Design Tolerances for Ramps, Sloped Walkways, Cross Slopes, and Level Surfaces (September 2020)
- Flooring Surfaces – Epoxy Terrazzo (September 2020)
- Walkways, Ramps, and Stairs (September 2020)
- Jointed Rail Bonding Details (C-Bonds) (August 2020)
- Environmental Regulations (June 2020)
- Flexible Fixture Hangers - "Swivel Type" Fixture Supports (June 2020)
- Overhead Contact System Pole Foundations (June 2020)
- Benches (May 2020)
- Concrete Anchors (May 2020)
- Electrical Junction Box Penetrations in Exterior and/or Wet Locations (May 2020)
- Electric Conduits (May 2020)
- Firestopping (May 2020)
- Height of Concrete Pedestals and Foundations (May 2020)
- Trash Receptacles (May 2020)
- Emergency Backup Power Generators for Stations/Facilities (April 2020)
- Fire Load (March 2020)
- Customer Assistance Area and Call Box (November 2019)
- Flood Resiliency (November 2019)
- Adhesive Anchors (October 2019)
- Drainage (April 2019)
- Electric Conduits (April 2019)
- Fiber Optic (April 2019)
- General Design (April 2019)
- Material Selection (April 2019)
- Ramps, Stairs, and Walkways (April 2019)
- Up and Over Path of Travel at Stations (April 2019)
- Construction Specification Development (August 2015)
- Permanent Construction (January 2015)
Note: Directives override standards and guidelines for specific elements in prior documents.
Waiver
Any deviation from a directive requires a waiver.
View our Design Directive Waiver