Traffic Management

Traffic Operations Center.PNGThe Traffic Signal Division is responsible for the maintenance and programming of the 41 signals along State and Township roads within Cranberry. This Division also maintains an additional seven signals through an Inter-Municipal Traffic Signal Maintenance Agreement with Adams Township, Seven Fields Borough, and Marshall Township. IMSA Certified Technicians work daily to maintain the intricate details of the traffic signalization plan.  
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If you observe a malfunctioning traffic signal or have a general concern about a signalized intersection, please call Customer Service, 724-776-4806. In an emergency, call 9-1-1.

TOC state-of-the-art equipment includes controllers, cabinets, back-up generators, decorative poles, ADA accessible pedestrian walkways and activation buttons. 

Of special note, all traffic signal lamps in Cranberry use LEDs in place of traditional tungsten bulbs in every signal face. Also, EVP, (Emergency Vehicle Pre-emption) is a sound-based system that listens for emergency sirens and assigns priority to those vehicles.

Managing traffic in Cranberry                               

Traffic Operations Center Project Partners 

  • Commonwealth of Pennsylvania
  • PennDOT District 10, Southwest PA Commission
  • Community Development Corp. Butler County (CDC)
  • Westinghouse Electric Co.
  • Pathmaster Inc. Twinsburg, Ohio
  • Econonlite Control Products 
  • Corning Cable Systems

Emergency Vehicles

Traffic light timing is normally governed by time of day and traffic levels. But when an emergency vehicle respond to a 911 call, its need to arrive quickly at the scene of an incident is critical. To achieve that, traffic signals in many communities, including Cranberry, can be pre-empted by approaching fire trucks, ambulances and police cruisers.

When a sensor mounted at an intersection detects the unique frequencies of the approaching vehicle’s siren, it overrides the normal timing cycle, and either turns green or extends a green light in the direction that the emergency vehicle is heading.

Once the vehicle clears the intersection, the signal sequence moves incrementally toward restoration of its normal cycle. Cranberry’s standard practice in emergency response is to dispatch multiple vehicles from different public safety services, and each of them can trigger a separate signal override. As a result, the normal signal sequence can be derailed for extended periods, sometimes taking as long as an hour to become fully restored.

Protests from motorists who arrive minutes after an emergency vehicle has pre-empted a signal are among the Township’s most frequent traffic complaints. If they didn’t see the fire truck passing, they conclude that the signal system has failed – not than that it has worked according to design by giving priority to emergency responders.

 In 1995, Cranberry Township was the first community in Pennsylvania to incorporate sound-based signal pre-emption. An earlier technology, Opticom, used light frequencies radiated by special emitters mounted on the top of an emergency vehicle to trigger the pre-emption. But the system had a poor track record and emergency responders didn’t like it.

The sound-based system responds to audio frequencies which are required by state law for emergency sirens. Every vehicle outfitted with a state-approved siren is able to operate the sensors.

Yellow DotThe Yellow Dot  program assists citizens in the "golden hour" of emergency care following a traffic crash when they may not be able to communicate their needs themselves. Placing a Yellow Dot decal in your vehicle's rear window alerts first responders to check your glove compartment for vital information to ensure you receive the medical attention you need. The program is a cooperative effort between PennDOT, the state departments of Health and Aging, the Pennsylvania State Police, the Pennsylvania Turnpike Commission, first responders, and local law enforcement. Request a participation form and kit. 

Planning keeps pace with community growth

Getting to, through, and around Cranberry easily has been a key priority for the Township since the 1980s when its rapid growth as a population and commerce center began in earnest.

In the 60s, there was a single ‘blinker’ at Rt. 19 and Mars Rd. By the mid-90s, the Township boasted a fiber optic, closed loop system and 15 signals.


Today, the Centracs central-based control system features full-motion video cameras currently installed at fifteen key intersections. Through partnerships and agreements with neighboring Adams and Marshall Townships, Cranberry operates 48 signals and currently 27 are interconnected for traffic flow and efficiency.