Services Provided
About the Project
St. Charles County, Missouri
CBB was a member of the Page Constructors Design-Build team and contributed to many parts of the Award-Winning Missouri 364 Phase 3 Design-Build Project in St. Charles County. The $72 Million project included the construction of 9 miles of new 4-lane freeway from Mid Rivers Mall Drive in Saint Peters to I-64 in Lake Saint Louis: thus, completing a freeway connection from I-270 in Saint Louis County to I-64 in Saint Charles County.
CBB participated in the development of conceptual interchange layouts and developed traffic models that were used to evaluate the project’s operational performance. All interchanges were evaluated with HCM methodologies, and the system was evaluated with VISSIM software. SYNCHRO was used to evaluate traffic signal operations. The models assisted the contractor team and MoDOT in selecting interchange concepts for each location and optimizing design details for each interchange. CBB was responsible for the project’s Access Justification Report (AJR) at the interchange of MO 364 with I-64.
One of CBB’s primary roles was to serve as the chief designer for all traffic signals and Intelligent Transportation Systems (ITS) on the project. In this role CBB developed design plans and coordinated design efforts between the contractor team, MoDOT, St. Charles County, and the various cities along the corridor. This work included four new and four modified traffic signals, six Dynamic Message Sign (DMS) boards, five Closed-Circuit Television (CCTV) surveillance camera stations, eight Remote Traffic Microwave Sensor (RTMS) detector units, and approximately 100,000 feet of fiber optic cable to connect these field devices to MoDOT’s Transportation Management Center (TMC). CBB was also responsible for all traffic signal operations on the project. Traffic signal timing plans were developed and implemented for both maintenance of traffic and permanent operations.
CBB also assisted the design-build team in the design of a roundabout at the termination of the westbound on/off ramps at Bryan Road. Duties included geometric review, elevation warping, grading, signing, and marking. As well as the design of the roundabout, CBB assisted the design-build team for various mainline tasks such as cul-de-sac/turn around details, gore warping details, overhead truss design and signpost height/quantities calculations.
PROJECT AWARDS
- Mid-America Association of State Highway and Transportation Officials (MAASHTO), Project of the Year for Quality of Life and Community Development, 2015
