Services Provided
About the Project
Various Locations
CBB has been a key member from the start on this collaborative effort including St. Charles County; MoDOT; and the Cities of St. Peters, O’Fallon, Wentzville, Lake St. Louis, Dardenne Prairie, Weldon Springs, and St. Charles. The project’s goal is to effectively manage regional transportation demands — regardless of jurisdictional boundaries.
The inaugural phase of the project included the design and procurement of County-wide Advanced Traffic Management System (ATMS), 320 Traffic Signal Controllers, Communication Upgrades including Cellular and Fiber Optic Cable, 25 Traffic Surveillance Cameras and 40 Travel Time Detectors. CBB performed a field inventory of over 300 signalized intersections maintained by the various agencies participating in this project. Ten corridors, including 160 traffic signals, were then identified as the highest priority in the region for the purposes of signal timing optimization. This process involved analyzing traffic volume data at each of the intersections (including collecting new counts when needed) as well as base travel time conditions (field measured) for each corridor.
Construction inspection services were also provided by CBB for locations involving installations of signal controllers, communication equipment (cellular or fiber optic cable), traffic surveillance cameras, and travel time detectors. The construction inspection duties included observation and documentation of daily construction activities, weekly progress reports, pay order applications, coordination with each respective agency’s personnel, and development of project punch-list and close-out items.
Since Phase I, the GGL project has progressed through several phases for both signal/ITS design as well as signal timing optimization. Most recently, CBB designed a CCTV expansion project to install 15 new surveillance cameras across the County. CBB was also selected for Phase 5 of GGL’s signal timing optimization which included traffic counts, field studies, flashing yellow arrow time-of-day analysis, clearance interval analysis, signal timing plans, and field implementation at over 25 signals. This was the third GGL signal timing optimization package that CBB was selected for. Across all projects, CBB’s new signal optimization plans have led to reduced travel times throughout the county which resulted in an estimated $3.9 million in annualized fuel savings and a pollutant emissions reduction of over 1,055,000 pounds per year.
