Inside South Carolina Department of Transportation

I-526 Corridor Analysis Project

Final Addendum

The I-526 Corridor Analysis Addendum Report is now complete. The addendum was conducted to consider the impacts of two proposed Charleston International Airport area improvement projects on the I-526 study corridor, particularly at the I-526 interchanges with International Boulevard and Montague Avenue. A Public Information Meeting has been scheduled for Tuesday, June 3rd from 5:30-7:30p at City of North Charleston City Hall to present the final recommendations of the original I-526 Corridor Analysis project as well as the addendum.
I-526 Corridor Analysis Final Addendum
Public Information Meeting

Final Analysis Report

The I-526 Corridor Analysis project is now complete, please click on the links below for the final I-526 Corridor Analysis Report.
Title Page
Executive Summary
Table of Contents
Public Involvement
Existing Corridor Infrastructure
Existing Corridor Travel Data
TDM Strategies
Modal Strategies
Traffic Operations Strategies
Capacity Improvement Strategies
I-26 & I-526 Interchange Improvement
Appendix A
Appendix B

SCDOT's Corridor Analysis for I-526 between North Charleston and West Ashley Project Website

The Corridor Analysis for I-526 between North Charleston and West Ashley examines an eight-mile segment of Interstate between Rivers Avenue and US 17 in West Ashley, including the system-to-system interchange of I-526 and I-26. If you live in the Charleston region or travel through the area on a regular basis, it is likely you are familiar with the high traffic volume along this corridor and its considerable congestion during the weekday AM and PM peak periods. Future traffic volumes are expected to increase considerably with several large developments planned in the area, including the construction and opening of a Boeing Dreamliner Plant, a new airline and renovations at the regional airport, and the expansion of the South Carolina State Ports Authority in North Charleston.

The study team's primary tasks are to gather baseline information about the corridor and to solicit ideas for reducing today's traffic and meeting tomorrow's needs. All options received from the public will be initially considered including:

  • Travel Demand Management - Alternatives to either reduce the overall travel in the corridor or spreading the peak travel demand to off-peak periods.
  • Modal Strategies - Investigate opportunities to shift vehicle or truck travel to other modes of travel, such as transit or rail.
  • Traffic Operations Strategies - Relatively low cost improvements to improve the efficiency of traffic flow.
  • Capacity Improvements - Projects that add highway capacity to the network of roads.

Feasible ideas will then be studied and evaluated with traffic analyses, travel demand modeling, and corridor geometric evaluations. By the conclusion of this study, alternatives will be identified and evaluated not only for near term, low-cost strategies, but also for more costly future-year capacity strategies.