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APRIL 7 - 12, 2014
The EViEWS System “Avoiding
Conflict” at the Intersection
maintenance. Most also suffer from not providing an infrastructure that incorporates
effective visual and audio emergency warning to motorists and pedestrians, clearance
of downstream intersections, and pedestrian
inhibit features. In addition, most EVP systems provide limited capabilities for transit
signal priority and highway-rail crossings.
The EVIEWS Solution
The EViEWS Priority System allows
emergency vehicles to wirelessly communicate with intersections using a radio- or
GPS-based implementation that transmits a
digitally coded spread-spectrum signal from
the vehicle at a distance of up to one mile
along a non-line-of-sight path. This signal is
transmitted every second to allow accurate
calculation by the intersection module of
the EV’s GPS position, speed, and direction.
The vehicle location and speed data are used
to provide optimized traffic signal prioritization. Signals are set to green on the EV
approach and red for opposing signals.
Preemption call requests are sent to
the signal controller on a real-time basis
instead of a fixed distance. Higher-speed
vehicles will trigger the controller earlier
than lower speed vehicles, and if a vehicle
stops or turns off the GPS approach path,
the vehicle will not trigger the controller
at all. Downstream intersections are also
being prepared for the arrival of the emer-
gency vehicles. The system tracks multiple
vehicles and assigns priority based on vehi-
cle type or first-come, first-served to ensure
no conflict in the intersection.
Many companies market specific applications such as signal preemption that
provide a green light for a first responder
approaching a single intersection at a time.
However, these systems are expensive and
high maintenance, lack security and scal-ability, and do not link to other traffic and
emergency management systems. EViEWS
is one of the only I TS companies that offers
a comprehensive suite of technologies that
provides core components to a comprehensive homeland security, public safety, and
RANDY LLOYD is president of EViE WS Safety
Systems, Inc. Prior to being named president in
2013, he spent several years providing sales and
marketing consultation to the company. Lloyd has
conducted presentations to congressional staff
members in Washington, D.C., to help further
their understanding of the vast solutions available
through the EViE WS system’s infrastructure.
Lloyd served in Desert Shield and Desert Storm,
where he was responsible for multiple missions
throughout the Middle East, including assisting
the Army’s global positioning system (GPS) asset
tracking and accountability program. Lloyd has a
bachelor’s degree in marketing from New Mexico