traffic signal preemption systems
TRAFFIC SIGNAL PREEMPTION SYSTEMS PUBLIC WORKS AND TRANSPORTATION
Mindy Carmichael P.E. Director of Public Works & Transportation April 16, 2018
EMERGENCY VEHICLE PREEMPTION
Emergency responders are the lifeline of their communities. Delays in arriving to the scene can put property and lives at risk Emergency Vehicle Preemption helps to make sure responders get to emergencies quickly and safely. With signal preemption, the likelihood of crashes can be reduced and responses can take less time Devices installed on the vehicle and at the signal allow the normal operation of traffic lights to be manipulated in the path of an emergency vehicle, halting conflicting traffic and allowing the emergency vehicle right-of-way
EXISTING OPTICOM SYSTEM
Opticom System with infrared (IR) transmitters
EXISTING OPTICOM SYSTEM
Emitters on emergency vehicles require a clear line of sight to the intersection receivers using infrared communication.
Requires four receivers (one per approach) on mast arms and one control unit in the signal cabinet at a typical intersection
Requires wiring from receivers at mast arms to the cabinet
Current system is over 15 years old and some parts are obsolete.
NEW TECHNOLOGY
Preemption and Priority System that combines cellular, radio, GPS technology Cloud Server
NEW TECHNOLOGY CONT.
Cloud based solution uses combination of 900MHz radio, cellular, and GPS network for redundant communication
In-vehicle units monitor emergency lights, left and right indicators to request preemption
System tracks emergency vehicle through GPS and can request preemption for the next signal in advance
NEW TECHNOLOGY CONT.
Only one control unit installed in the signal cabinet. No line-ofsight issue and no receiver or wiring necessary.
Web-based system that tracks vehicles and predicts and performs intersection preempt requests in real time
Interactive reporting system that summarizes routes vehicles have traveled, historical data, and average response times
NEW TECHNOLOGY CONT.
Smart City Advantages
Compatible with Connected Vehicle application SPaT Messaging – (Signal Phase and Timing) Train Approach Alert Fire Truck Approach Alert Pedestrian/Bicycle Proximity Alert DSRC – (Dedicated Short Range Communication) Generates reports and alerts on condition of signal cabinet
NEW TECHNOLOGY CONT.
Anticipated Costs:
Cost per intersection - $4000 per roadside unit
Cost for emergency vehicle - $4500 per emitter
One time citywide installation cost of approximately $1.75M with 5 year data plan and vendor support included
Data plan must be renewed after initial 5 years
Questions & Discussion
Mindy Carmichael P.E. Director of Public Works & Transportation April 16, 2018
EMERGENCY VEHICLE PREEMPTION
Emergency responders are the lifeline of their communities. Delays in arriving to the scene can put property and lives at risk Emergency Vehicle Preemption helps to make sure responders get to emergencies quickly and safely. With signal preemption, the likelihood of crashes can be reduced and responses can take less time Devices installed on the vehicle and at the signal allow the normal operation of traffic lights to be manipulated in the path of an emergency vehicle, halting conflicting traffic and allowing the emergency vehicle right-of-way
EXISTING OPTICOM SYSTEM
Opticom System with infrared (IR) transmitters
EXISTING OPTICOM SYSTEM
Emitters on emergency vehicles require a clear line of sight to the intersection receivers using infrared communication.
Requires four receivers (one per approach) on mast arms and one control unit in the signal cabinet at a typical intersection
Requires wiring from receivers at mast arms to the cabinet
Current system is over 15 years old and some parts are obsolete.
NEW TECHNOLOGY
Preemption and Priority System that combines cellular, radio, GPS technology Cloud Server
NEW TECHNOLOGY CONT.
Cloud based solution uses combination of 900MHz radio, cellular, and GPS network for redundant communication
In-vehicle units monitor emergency lights, left and right indicators to request preemption
System tracks emergency vehicle through GPS and can request preemption for the next signal in advance
NEW TECHNOLOGY CONT.
Only one control unit installed in the signal cabinet. No line-ofsight issue and no receiver or wiring necessary.
Web-based system that tracks vehicles and predicts and performs intersection preempt requests in real time
Interactive reporting system that summarizes routes vehicles have traveled, historical data, and average response times
NEW TECHNOLOGY CONT.
Smart City Advantages
Compatible with Connected Vehicle application SPaT Messaging – (Signal Phase and Timing) Train Approach Alert Fire Truck Approach Alert Pedestrian/Bicycle Proximity Alert DSRC – (Dedicated Short Range Communication) Generates reports and alerts on condition of signal cabinet
NEW TECHNOLOGY CONT.
Anticipated Costs:
Cost per intersection - $4000 per roadside unit
Cost for emergency vehicle - $4500 per emitter
One time citywide installation cost of approximately $1.75M with 5 year data plan and vendor support included
Data plan must be renewed after initial 5 years
Questions & Discussion
