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Grants and Contracts Details
Description
The objective of this research is to quantify the operational benefits of preempting an
entire corridor for emergency vehicle operations, rather than preempting each individual
intersection as the emergency vehicle arrives. The benefits would be derived by
eliminating or minimizing the transition period when coordinated operation is interrupted,
as well as decreased travel time for the emergency vehicle. A normal preemption
program includes parameters that dictate the duration of green time and which
movement(s) to serve after the preemption call terminates. It is anticipated that the
corridor-level preemption will operate more like the initiation of an alternative (or
existing) coordinated timing plan with variable green times and offsets that account for
the anticipated speed of the emergency vehicle. This evaluation will be performed with
a VISSIM model based on South Limestone Street in Lexington, KY. In order to best
emulate real-world operations, the evaluation will utilize both software-in-the-loop and
hardware-in-the-loop simulation. Traditional preemption will be evaluated using logic
from Econolite ASC/3 controllers in a software-in-the-loop environment. Corridor level
preemption will be evaluated using logic from the InSync adaptive control system in a
hardware-in-the-loop environment.
High resolution data collected from existing signal systems may also be evaluated to
quantify emergency vehicle preemption performance along these corridors.
Status | Finished |
---|---|
Effective start/end date | 3/1/14 → 6/30/15 |
Funding
- University of Tennessee
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Projects
- 1 Finished
-
Development and Evaluation of Coordinated Traffic Signal Emergency Preemption System
Kirk, A. (PI)
3/1/14 → 6/30/15
Project: Research project