Carolina Crossroads:
I-20/26/126 Corridor Improvement Project

Phase 3 - I-20/26 & I-26/126 System Interchanges, St. Andrews Road at I-26 Interchange, and Bush River Road at I-20 Interchange

The South Carolina Department of Transportation (SCDOT), in cooperation with the Federal Highway Administration (FHWA), is proposing improvements to the interstate corridor of I-20/26/126, including the system interchanges at I-20/I-26 and I-26/I-126 in Lexington and Richland Counties. These improvements are proposed to increase mobility and enhance traffic operations by reducing existing traffic congestion within the I-20/26/126 corridor, while accommodating future traffic needs. The corridor's approximately 14 miles of mainline interstate include I-26 from Exit 101 - Broad River Road (US 176) to east of the Saluda River, I-20 from the west of the Saluda River to west of the Broad River, and I-126 from I-26 to east of the interchange with Colonial Life Boulevard. The project website is at

In general, Phase 3 consists of reconstruction of the I-20/I-26 system interchange, reconstruction of the I-26/I-126 system interchange, reconstruction of the I-26/St. Andrews Road interchange, reconstruction of the I-20/Bush River Road interchange, completion of widening of I-20 west of the I-20/I-26 interchange and widening of I-26 from just west of St. Andrews Road to the US-378 interchange.

Notice to Potential Proposers

Phased Construction Map and Schedule (Posted 10/1/19)
Project Phasing Plan (Posted 10/1/19)

Notice to Parties Interested in Providing Design Build Services

Qualifications and/or proposals from any contracting entity must utilize the new ProjectWise electronic proposal submission system. The following information describes the process that teams should follow to access the SCDOT ProjectWise environment for proposal submissions and their respective project data using the new system. Please use this ProjectWise Account Setup & Requirements link to set up accounts.