Central Mesa Extension

Client – Valley Metro Phoenix, AZ
Construction Value – Approximately $400M
Completion Date (Construction) – 2014valleymetrophoenix

Valley Metro serves Phoenix and a number of surrounding cities with approximately 19 miles of double track light rail transit system. Mesa Extension will add an additional 3.1 miles of LRT system from Downtown Tempe through downtown Mesa.

Teaming with the Jacobs/Stantec Team, Armand Consulting Inc (ACI) led the Systems Engineering Design efforts for this project. As Systems Engineering Design Lead Consultant, ACI was responsible for a complete system design including Traction Power, Signaling, OCS, Communications, and Corrosion Control for the 4 miles build-out of the Mesa Extension. ACI led the systems integration design overseeing the development of a comprehensive list of functional areas and identification of interfaces for Interface Matrix, and Interface Data Sheets (IDS) for the identified interfaces, and monitor the resolution of issues by engineers and contractors. These items were used to prepare the Systems Integration Report including an interface plan, interface matrix, and interface data sheets.

Significant system components include:

  • Integration with street traffic control signals on street running segments;
  • Radio System modification to accommodate for new extension;
  • Train control system upgrade / modification;
  • Train-to-wayside communications system;
  • Microprocessor interlocking;
  • Automatic highway crossing warning systems;
  • Fiber optics and data transmission system;
  • Potential of a new central control build-out to be located at current Maintenance;
  • CCTV upgrade /modification;
  • Voice Over IP Telephone System upgrade and modification;
  • Public address and variable message signs upgrade/modification;
  • Upgrade/modification of the train movement monitoring through the existing Automatic Vehicle Locator (AVL) System;
  • Traction Power System Upgrade/Modification based on simulation results;
  • OCS system design to accommodate various challenges within the right-of-way;
  • Interfacing between traffic signal and light rail signal systems;
  • Ducts and conduit provisions for signals, communications, OCS and Corrosion Control sub-systems;
  • Mesa Main Street
  • Interfacing with utility companies for medium- and low-voltage services to stations, traction power substations, communications interface cabinets, signals houses and other system facilities located along the alignment.