NOACA Regional ITS Architecture

GCRTA Bus Traffic Signal Priority

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Description

Study key transit corridors for applicability of bus traffic signal priority to improve transit travel time. Implement transit signal priority on traffic signals on identified corridors.

Status

Planned

Timeframe

Short-Term Priority

Geographic Scope

Service Scope

Costs - $500,000; Operations and Maintenance Costs (per year) - $1,000 per signal.

Stakeholders

City of Cleveland

Greater Cleveland Regional Transit Authority (RTA)

Municipal Public Works Departments

Inventory

City of Cleveland Signal Control System

City of Cleveland Traffic Signals

Municipal Field Equipment

Municipal Signal Control Systems

RTA Fixed Route Vehicles

Services

APTS09-1 - Transit Signal Priority - GCRTA (1 of 2)

Functional Areas

On-board Transit Signal Priority

• The transit vehicle shall determine the schedule deviation and estimated times of arrival (ETA) at transit stops.
• The transit vehicle shall prevent a priority request from being sent when the transit vehicle cannot use the priority (e.g., when the transit vehicle makes a passenger stop on the approach to an intersection).
• The transit vehicle shall send priority requests to traffic signal controllers at intersections, pedestrian crossings, and multimodal crossings on the roads (surface streets) and freeway (ramp controls) network that enable a transit vehicle schedule devia
• The transit vehicle shall send the schedule deviation data and status of priority requests to the transit vehicle operator and provide the capability for the transit vehicle operator to control the priority system.

Roadway Signal Priority

• The field element shall notify controlling traffic management center and maintenance center that the signal timing has changed based on a signal preemption/priority request to help those centers determine whether a fault detected at the signal is a true m
• The field element shall respond to requests for indicator (e.g., signal) priority requests from transit vehicles at intersections, pedestrian crossings, and multimodal crossings.

TMC Multimodal Coordination

• The center shall exchange information with transit management centers including details current transit routes, the level of service on each route, and the progress of individual vehicles along their routes.
• The center shall respond to requests from transit management centers for signal priority at one or more intersections along a particular transit route.

TMC Signal Control

• The center shall collect traffic signal controller fault data from the field.
• The center shall collect traffic signal controller operational status and compare against the control information sent by the center.
• The center shall implement control plans to coordinate signalized intersections, under control of center personnel, based on data from sensors and surveillance monitoring traffic conditions, incidents, emergency vehicle preemptions, the passage of commerc
• The center shall remotely control traffic signal controllers.

Interfaces

Source	Architecture Flows	Destination
City of Cleveland Signal Control System	signal control data	City of Cleveland Traffic Signals
City of Cleveland Traffic Signals	request for right-of-way	City of Cleveland Signal Control System
City of Cleveland Traffic Signals	signal control status	City of Cleveland Signal Control System
Municipal Field Equipment	request for right-of-way	Municipal Signal Control Systems
Municipal Field Equipment	signal control status	Municipal Signal Control Systems
Municipal Signal Control Systems	signal control data	Municipal Field Equipment
RTA Fixed Route Vehicles	local signal priority request	City of Cleveland Traffic Signals
RTA Fixed Route Vehicles	local signal priority request	Municipal Field Equipment

Standards

SDO	Document ID	Title	Type
AASHTO/ITE/NEMA	View List	NTCIP Center-to-Field Standards Group	Group
ASTM	View List	Dedicated Short Range Communication at 915 MHz Standards Group	Group
ASTM/IEEE/SAE	View List	Dedicated Short Range Communication at 5.9 GHz Standards Group	Group
AASHTO/ITE/NEMA	NTCIP 1201	Global Object Definitions	Message/Data
AASHTO/ITE/NEMA	NTCIP 1202	Object Definitions for Actuated Traffic Signal Controller (ASC) Units	Message/Data
AASHTO/ITE/NEMA	NTCIP 1210	Field Management Stations (FMS) - Part 1: Object Definitions for Signal System Masters	Message/Data
AASHTO/ITE/NEMA	NTCIP 1211	Object Definitions for Signal Control and Prioritization (SCP)	Message/Data
APTA	APTA TCIP-S-001 3.0.0	Standard for Transit Communications Interface Profiles	Message/Data

Operational Concepts

Stakeholder	Roles and Responsibilities
Greater Cleveland Regional Transit Authority (RTA)
	Coordinate with the local traffic operations centers for traffic signal priority.
	Track and evaluate schedule performance on all fixed-route transit vehicles.
	Track the location of transit vehicles.
City of Cleveland
	Provide signal priority for transit vehicles.
Municipal Public Works Departments
	Provide signal priority for transit vehicles.