I-64 Widening Traffic Management Plan Project Report Bridge

Summary

Kaskaskia Engineering Group, LLC (KEG) provided Phase I engineering services to the Illinois Department of Transportation (IDOT), District 8, by creating a Traffic Management Plan (TMP) for the proposed I-64 Widening Plan in O’Fallon, IL. The TMP serves a fundamental role in meeting the goals set by the Federal Work Zone Mobility Rule and the Safety Engineering Policy Memorandum, Safety 3-07 for all Federally Funded Projects.

Project

The project will expand I-64 to a six-lane cross-section between Green Mount Road and west of IL Route 158. The project will consist of enclosing the existing median ditch to accommodate an additional 12’ future lane and shoulders in each direction. This includes the construction of a concrete barrier wall and enclosed storm sewer and median inlets. The project will also include lowering the roadway profile under the Green Mount Road Bridge (S.N. 082-0344) and the County Highway 43/Lincoln Ave bridge (S.N. 082-0181).

Construction of the proposed improvements requires a change in traffic control to accommodate the closure of both eastbound and westbound lanes. KEG developed a Transportation Management Plan (TMP) to address all mobility goals set forth in BDE 13-1.01. Components of the TMP included a proposed sequence of construction operations, identifying key stakeholders, a public information plan the selection of appropriate Highway Standards and special provisions, an estimated cost of the recommended traffic control strategies work-zone queuing analysis, crash analysis, and traffic control plan.

KEG also provided the Client and Owner with three concept-level traffic management plans to aid in the selection of a preferred traffic control strategy. Two of the three concept plans utilized median crossovers and full lane closures, and the third plan utilized a temporary lane on the outside shoulder to accommodate two travel lanes in each direction. Ultimately IDOT preferred the use of two lanes in each direction with no crossovers.

The project is currently still in Phase I and is set to begin construction in 2021.