One goal of PASSAGE is to connect 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 250 of these signals are already part of the PASSAGE network. Several construction projects are currently underway that will add approximately 150 more signals to the PASSAGE system.