03/20/2025
Diverging diamonds are a driver's best friend. 🚗 And soon, a bustling Spartanburg County roadway will soon boast South Carolina’s third “diverging diamond” interchange.
The project at Interstate 85 and SC Highway 290 in Duncan is about a year behind schedule, but construction is expected to finish before summer.
🚦 The innovation in traffic engineering is designed to move vehicles more quickly and safely through busy intersections.
Specifically, vehicles exiting I-85 and turning left onto Highway 290 won’t have to cross through an intersection. They will stay on the left side of the highway – keeping the traffic moving – before transitioning back to the right after crossing the bridge over the interstate.
Here's how it works: bit.ly/4iGZAul