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Traffic and infrastructure is the number one issue I hear about from constituents, and one intersection comes up again and again: where Secessionville Road, Old Military Road and Grimball Road Extension all meet.
If you've driven through it, you already know the problem: Drivers coming from Secessionville face a Yield sign, drivers from Old Military face a Stop sign, and drivers from Grimball Road Extension have no sign at all. Three different rules at one intersection — it's confusing, and it's been a top complaint I have heard about from District 12 residents after knocking thousands of doors last fall, and in subsequent Office Hours and Town Halls I have held over the last six months.
I'm thrilled to share that City Council approved a fix: the City’s first-ever mini-roundabout!
A mini-roundabout is a small, low-impact way to give every driver the same clear rule, instead of three conflicting ones. It's not a full-size roundabout — it's a compact design built to fit within the road's existing footprint. It's also “traversable,” meaning fire trucks and other emergency vehicles can safely drive right over the center island if they need to.
Roundabouts have been shown to be safer than three-way stops, and they keep traffic moving more efficiently. That's a big part of why this option is a better choice than simply adding two more Stop signs.
As part of the project, speed limits are coming down too: Old Military Road will drop from 35 to 30 mph on the approach to the roundabout, and Grimball Road Extension will drop to 30 mph from Folly Road.
No Property Impacts, No Tree Removal
Any construction project raises questions about what it means for the neighbors nearby. And that's why this project is a win-win-win: All work will happen within the existing right-of-way. That means:
- No property acquisitions
- No anticipated impacts to trees
- No anticipated flooding or stormwater impacts
What's Next
Yesterday, I dropped-off information to surrounding residents, and we will host a community meeting on Wednesday, August 5 at 6:30pm at Thomas Johnson Park.
The City will hire a contractor to build the roundabout's center island. We don't have a construction start date yet — that will depend on the contractor's schedule — but given how minimal the actual work is, construction should not take long once it begins.
If you would like more information on how mini-roundabouts work elsewhere, NACTO has a helpful guide, and SCDOT's Traffic Calming Guidelines cover the design standards we're following (see page 19).
As always, if you have questions, please reach out at skardonl@charleston-sc.gov.
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