Inside South Carolina Department of Transportation

Construction Projects

Personnel

Leadership

Finance

Internal Audit Services

Reports

Office of Planning

Publications & Outreach

Environmental Services

Columbia Corridor Management Plan - Fact Sheet

The Columbia Corridor Management Plan consist of 83 miles of interstate and freeway facilities along the following sections:

  • I-20 from Longs Pond Road (Exit 51) to Clemson Road (Exit 80)
  • I-26 from Peak Exit (Exit 97) to US 21/321 (Exit 119)
  • I-77 from I-26 to Killian Road (Exit 22)
  • I-126 for the entire length
  • SC 277 from I-77 to Bull Street (US 76)

There are three (3) interstate to interstate and two (2) interstate to freeway interchanges along with 44 interstate to surface street interchanges. The interchange of I-20/I-26 and I-126 is being evaluated as a standalone project know as Carolina Crossroads.

The guiding study principle is the Congestion Management Process utilizing performance measures to identify and vet strategies. The study will focus on the following four identified approaches:

  • Travel Demand Management - A series of strategies to reduce the overall travel demand or shift demand out of the peak travel periods (i.e.: Rideshare, Telecommuting, compressed workweek).
  • Modal Strategies - Define opportunities to shift single occupancy trips to transit or truck freight trips to other modes (i.e.: Transit Improvements, Freight Peak-Hour Incentives/Disincentives).
  • Traffic Operational Improvements - Low cost improvements to improve the utilization the existing capacity of corridors and safety (i.e.: Localized Geometric improvements, Incident Management Improvements).
  • Capacity Improvements - Construction projects developed to add to the capacity of the corridors (i.e.: Interstate Widening, Interchange Upgrades).

The study team will be guided by a Steering Committee of transportation professional from Federal, State, Counties and Municipalities within the study area. A Stakeholder Committee of local business and industry leaders as well as State and Local elected officials. Committee input will received and vetted over four (4) schedule meeting. In addition, the study team will receive input from the public at two (2) public information meeting where concepts and ideas will be exchanged gauge public opinion of the study approach and outcome.

The final deliverable of the project will be a Corridor Management Plan for 2040 with a phased implementation plan based on a matrix of congestion reduction benefit and cost benefit analysis.