Section 2: Deployment 10
2.1 Procurement 10
Identification of System Objectives and Requirements
Request for Proposal Preparation and Proposal Evaluation
2.2 Pre-Installation Site Survey 11
2.3 System Installation 11
2.4 Evaluation 12
Preface
Emergency vehicle preemption and transit priority are two forms of preferential traffic signal control strategies provided to facilitate the flow and passage of fire and rescue vehicles and transit buses. Transit priority requests are often conditional and may, for example, be granted on one or more conditions such as the absence of a pedestrian phase, the presence of a green interval, and a prescribed level of bus occupancy or degree of bus lateness. Emergency vehicle preemption requests, on the other hand, are usually only conditional on the absence (or completion) of the pedestrian phase and may involve either a green extension or a red truncation. A trend taking place is to coordinate the planning and deployment of emergency vehicle preemption and transit priority strategies for the purposes of developing a single, integrated traffic signal control system.
This document provides guidelines on the planning and deployment of emergency vehicle preemption and transit priority strategies and should be of interest to state and local traffic engineers, fire and rescue officials, and public transit planners and operators in the Metropolitan Washington D.C. Region.
This document is a product of a research project underway at the Virginia Tech Transportation Institute (VTTI) in collaboration with George Mason University. The project entitled, A Study to Examine the Use of Signal Preemption and Other Priority Strategies along Signalized Intersections in the Washington, D.C. Area, began in March 2000.
The sponsors of this research are the Washington Metropolitan Council of Governments, Virginia Department of Transportation, and the Maryland Department of Transportation.
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