One goal of PASSAGE is to interconnect Lake
County’s traffic signals through a high speed communication network. The PASSAGE
network allows TMC operators to manage and adjust traffic signal timings
during a major traffic incident. Changing the timing of surrounding traffic
signals helps traffic to flow around the impacted area. Real time
connections also allow operators to detect malfunctioning signals and notify
service personnel. There are approximately 700 traffic signals in Lake
County, owned by IDOT, Lake County, Cook County, or one of 12 partner
municipalities. Approximately 140 of these signals are already part of the
PASSAGE network. A construction project is currently underway that
will add approximately 200 signals to the PASSAGE system by the end
of 2009.
