GA-400 & Holcomb Bridge Road: Why Roswell’s Busiest Interchange Is One of Its Most Accident-Prone

Quick answer: Holcomb Bridge Road at GA-400 is Roswell’s single busiest and most congested interchange — it’s the city’s only direct access to GA-400 and carries more than 70,000 vehicles a day, making it the most heavily traveled east–west interchange north of I-285. That volume, combined with highway-speed merges onto GA-400 (55–65 mph) and dense retail traffic on Holcomb Bridge, makes it one of the most accident-prone locations in Roswell.

If you’ve been hurt here, document the scene, get medical care, and talk to a Georgia injury attorney before dealing with any insurer. Buckhead Law: 770-GET-PAID.

Where is this interchange?

GA-400 is a major north–south expressway connecting Atlanta to the northern suburbs of Fulton and Forsyth counties. Holcomb Bridge Road (SR 140) crosses it at Exit 7 in Roswell, lined with shopping centers, restaurants, offices, and apartments.

Because it’s Roswell’s only interchange with GA-400, essentially all of the city’s east–west highway traffic funnels through this one point — which is exactly why it stays congested.

Why is GA-400 & Holcomb Bridge so dangerous?

The volume is extreme for a single interchange. More than 70,000 vehicles a day travel Holcomb Bridge Road through the GA-400 interchange, making it the most heavily traveled east–west interchange north of I-285. Roswell officials have called it the city’s single largest transportation challenge.

Highway-speed merging is unforgiving. GA-400 carries commuter and commercial traffic at 55–65 mph, and the on- and off-ramps around Exits 7, 7A, and 8 force drivers to merge at those speeds. Failure to yield while merging produces sideswipe and rear-end crashes, and the stakes are high at highway speed — this stretch has seen fatal wrecks.

Holcomb Bridge itself stays jammed. As one of the highest-traffic corridors in north Fulton, Holcomb Bridge Road is lined with businesses generating a constant flow of vehicles entering and exiting. Left-turn crashes, rear-end collisions from sudden braking, and pedestrian conflicts are all common along the corridor.

It’s being rebuilt — which signals the problem. GDOT’s GA-400 express lanes project includes a major redesign of the Holcomb Bridge interchange, incorporating diverging-diamond-style improvements, additional turn lanes, and extended acceleration lanes. Big interchange reconstructions get prioritized where congestion and crash history justify them.

What types of crashes happen here most?

• Merge crashes (sideswipes and rear-ends) on the GA-400 ramps at highway speed
• Rear-end collisions from sudden braking in stop-and-go interchange traffic
• Left-turn crashes along Holcomb Bridge Road
• Pedestrian conflicts near the retail-heavy corridor

What should you do after a crash here?

1. Get to safety and call 911 — on a high-speed interchange, clearing live lanes matters first.
2. Document the scene — vehicle positions, damage, ramp or lane location, and the other driver’s details.
3. See a doctor promptly, even if you feel okay; highway-speed crashes can cause injuries that surface later.
4. Be careful with insurers — you’re not required to give the other driver’s insurer a recorded statement.
5. Talk to a Georgia injury attorney before settling, especially in highway or multi-vehicle crashes, where fault and evidence can be contested.

How long do you have to file a claim in Georgia?

Georgia’s statute of limitations for most personal injury claims is two years from the date of injury (O.C.G.A. § 9-3-33). Exceptions can shorten that window — including claims involving a government entity — so confirm your specific deadline with an attorney.