• Transit Signal Priority
  • Transit Signal Priority
  • Emergency Vehicle Preemption

Increase Safety — Decrease Travel Time

Emergency Vehicle Preemption and Transit Signal Priority

The EMTRAC Priority Management System uses precise navigation technology and secure RF communication to detect equipped transit, emergency, and municipal vehicles and to place priority or preemption requests to intersection signal-control equipment.


EMTRAC Introduction Video: Transit Signal Priority (TSP) and Emergency Vehicle Preemption (EVP)
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the technological leader in signal priority

EMTRAC Rail Line Safety Video: Rail Transit Signal Priority (TSP) and Safety System
EMTRAC Rail Line Safety Video Thumbnail

Rail-Line Safety

EMTRAC Rail-Line Safety

with rail-operator notifications

EMTRAC Rail Worker Safety Video: Demonstrating how Transit Agencies Can Improve Safety for Right-of-Way Rail Workers
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Rail Worker Safety

EMTRAC Rail-Worker Safety

wayside and onboard notification system

EMTRAC Rail Worker Safety Test Video
EMTRAC Rail Worker Safety Test Video Thumbnail

Rail Safety Test

EMTRAC Rail-Safety Test

right-of-way and rail-operator notifications

EMTRAC News Items

EMTRAC Priority Control in Kennewick, Washington

Emergency Vehicle Activating EHB and Leaving Station

August 23, 2016 - EMTRAC has a new user in the City of Kennewick, WA, and their recently installed system demostrates the compatibility of EMTRAC optical equipment with legacy optical emitters made by competitors.

The EMTRAC System was chosen to provide safe egress for emergency vehicles from a new fire station. An EMTRAC wide-angle optical sensor was positioned across the street from the doors of the station, and an EMTRAC Priority Detector was installed in a stand-alone rack in an existing traffic signal cabinet at a nearby intersection. When the Priority Detector receives a call from the sensor it initiates a high-priority preemption call to the traffic controller and also activates an Emergency Hybrid Beacon (EHB) Signal. The EHB is used to stop traffic in front of the station to allow egress of emergency vehicles.

The Installed EMTRAC Priority Detector

Installed Priority Detector

ACT Traffic Solutions designed the installation and reprogrammed the traffic controller to support the EHB.

EMTRAC Bicycle Detection

EMTRAC Bicycle Detection in Minneapolis

May 17, 2016 - Increased safety is an important part of the what the EMTRAC priority management system provides. At a basic level, a higher level of safety is achieved by detecting first-response vehicles and granting them signal priority, thus allowing them to more quickly respond to emergencies while reducing the potential for accidents from crossing vehicles.

However, the EMTRAC system is also used in many cities across North America to detect and grant signal priority to transit vehicles, which contribute to the effectiveness of transit as a whole. Transit ridership is increasing in many areas, and the EMTRAC system provides a comparatively low-cost way to increase schedule adherence.

Similarly, the use of bicycles for transportation is also increasing in many areas. To facilitate this changing nature of transportation—and to encourage active lifestyles—a number of cities are making a concerted effort to expand or improve their bicycle infrastructure.

Infrastructure improvements include dedicated and protected bike lanes, bike boxes (which allow bicyclists to get a head start at intersections), and bicycle traffic lights (which have specific symbols for directing bicycle-only traffic).

In addition to promoting an active lifestyle, these specialized infrastructures also help reduce both collisions and injuries. A 2009 review of 23 studies on bicycling injuries found that bike facilities (e.g. off-road paths, on-road marked bike lanes, and on-road bike routes) are where bicyclists are safest.[1]

However, one continual challenge has been in detecting bicycles at intersections, making the task of bicycle-based signal phasing difficult at best.

The EMTRAC bicycle detection system enables cities to simplify the task of detecting bicycles, while also allowing them to apply the appropriate level of signal priority that is granted to bicycles (and other difficult-to-detect vehicles). The system utilizes the same intersection hardware that is used for both Emergency Vehicle Preemption (EVP) and Transit Signal Priority (TSP). The bicyclist needs only install the EMTRAC detection application on their mobile device.

One way EMTRAC bicycle detection increases safety is by making existing bicycle facilities more effective. As bicyclists are consistently detected and granted signal phasing, rather than having to wait for motorized traffic to "trip" actuated signals, their wait time (and their commute time) decreases—along with their frustration.

As a result, bicycling becomes a more effective alternative to motorized transportation.

The EMTRAC system has been used similarly by transit agencies. By using the EMTRAC system, buses and trains throughout North America are able to more effectively maintain schedule adherence. In these communities, public transit is a valuable asset, and transit ridership has increased as a result.

In regards to safety, bicyclists encounter fewer opportunities to consider "running" red signals when they're consistently detected and the corresponding signal is able to react to their presence.

A Chicago Tribune article noted that bicycle infrastructure on one corridor increased bicyclists obeying traffic signals by 161 percent. The article quotes Lee Crandell of the Active Transportation Alliance as saying "It's important to have infrastructure that speaks to people who are biking. Otherwise, they feel the roadway was not designed for them."[2]

The EMTRAC bicycle detection system gives traffic agencies another way to do exactly that.

  1. Reynolds, C., et al., 2009 - The impact of transportation infrastructure on bicycling injuries and crashes: a review of the literature, Environmental Health, 8:47
  2. Hilkevitch, Jon. "City says Dearborn bike signals keeping cyclists in line." Chicago Tribune 10 June 2013: Web. 16 May 2016. http://articles.chicagotribune.com/2013-06-10/classified/ct-met-getting-around-0610-20130610_1_cyclists-signals-bike-traffic>