Posted By Alan Donald @ Jun 28th 2022 3:47pm In: Infrastructure

The Mark Clark Extension Project

This proposed highway extension project connects the Southern end of I-526/Hwy 17 with the James Island Connector and Downtown Charleston.

The following information was extracted from

"The purpose of the Mark Clark Extension project is to increase the capacity of the regional transportation system, improve safety, and enhance mobility to and from the West Ashley, Johns Island and James Island areas of the Charleston metropolitan area." 

Current Project Schedule

Mark Clark Extension Project Schedule

Proposed 2-Phase Project

Mark Clark Extension 2-Phase Project

Here's a great video simulating the proposed extension from the air:

If you have questions, please visit