STC RRFB System to Scottsdale, AZ
TEMPE, AZ - 08/08/2013 - The City of Scottsdale, AZ has installed its second
RRFB system using equipment manufactured by Solar Traffic Controls. The
system was installed as a mid-block crossing to allow users on a canal trail
to cross a busy collector back to a residential neighborhood.
The location consists of two travel lanes in each direction, a left turn
lane on the SB side of the road and a landscaped median which offers a
pedestrian refuge. Previously, the crossing had only static signs to warn
motorists of the pedestrian crossing. As part of a larger improvement
project, Scottsdale re-striped the crossing and the approaches, enhanced the
signage and added the STC RRFB system to heighten pedestrian safety.
STC furnished a 3-pole system for the project with a design based on the
Solar Ped-X 'wireless' crosswalk control platform. Each is a self-contained
system with solar array, battery bank and control electronics, and includes
control logic tied into an FHSS radio modem to allow the units to
communicate with each other.
Each pole in the system is equipped with a Polara Bulldog push button to
prevent vandalism. To ensure proper operation, the three units perform a
periodic check of each other via radio. In the event a unit is "lost" in the
group and stops communicating, a fault flash pattern is displayed by the
master unit. The fault flash is coded to inform the user of the source of
The RRFB lamp assembly deployed for the project is an STC 80BKRRFBHS-T4 on
the curbs. This model RRFB is a dual-faced unit with 3-inch x 7-inch lamps
on each side of a 2-inch x 4-inch aluminum frame assembly. It also includes
a high intensity pedestrian indicator lamp on the end of the lamp assembly
facing into the crosswalk. Although the original spec for the project did
not require the confirmation lamp, STC provided it as a free upgrade. The
median unit uses an STC 80BKRRFBHS-T6 assembly which has quad 3-inch x
7-inch lamps and no pedestrian confirmation lamps. Each unit was outfitted
for mounting on a 4.5-inch O.D. pole.
From site visits done by STC, acceptance of the systems by local users
appears good based on use seen during these visits. Motorist compliance to
stop for pedestrians appears to be very good as well. Scottsdale is
currently testing another RRFB system within the city to begin formulating
standards for use at other locations. Installation of the equipment was
completed by Kimbrell Electric of Glendale, AZ. STC applications engineer
Jimmie Dixon directed the project.
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