CMAP ITS Architecture v4.0

CTA Bus Radio Communications Replacement and Upgrade

Description

Project to replace current bus radio equipment with equipment that will integrate with the computer aided dispatch (CAD) system. It will replace much data transmitted over radio channels to the cell phone modem instead, freeing up radio channels for voice communication. The need for voice communication will be further increased because the dispatchers will be able to send text messages to the new on–board MDT. The on–board MDT was replaced with a different unit designed to give the operator location information about preceding buses and following buses allowing the operator to monitor and reduce bus bunching. This capability will also reduce the need for directions from supervisors. This capability will reduce bus bunching. GPS and radio connect replaced BECS. CAD is operating but radio bandwidth was limited. Replace vehicles in March 2016. Radios to be replaced. No funding is available now. Data channels converted to voice – 8 total in use now. Dynamic scheduling. These upgrades are ongoing.

Status

Existing

Timeframe

Short

Stakeholders

Chicago Transit Authority

Inventory

Chicago Transit Authority Bus Vehicles
Chicago Transit Authority Communications Infrastructure
Chicago Transit Authority Control Center

Services

PT05–Transit Security

Interfaces

Source	Flow	Destination	Status
Chicago Transit Authority Bus Vehicles	alarm notification	Chicago Transit Authority Control Center	Planned
Chicago Transit Authority Bus Vehicles	transit vehicle operator authentication information	Chicago Transit Authority Control Center	Planned
Chicago Transit Authority Control Center	alarm acknowledge	Chicago Transit Authority Bus Vehicles	Planned
Chicago Transit Authority Control Center	driver instructions	Chicago Transit Authority Bus Vehicles	Existing
Chicago Transit Authority Control Center	transit vehicle operator authentication update	Chicago Transit Authority Bus Vehicles	Planned