APEX, N.C. (WNCN) — Emergency crews have cleared the scene of a messy crash that caused heavy delays at the Triangle Expressway as the Thursday morning commute ended.

According to the North Carolina Department of Transportation, all lanes on N.C. Highway 540 were closed where the crash took place around 9 a.m. Thursday.

North Carolina State Highway Patrol told CBS 17 that the 18-wheeler was carrying sand overturned and spilled sand all over the highway.

The truck carrying sand that overturned (Al Currie/CBS 17)

Troopers said the driver was injured in the crash and taken to a nearby hospital for medical treatment. Troopers are still actively investigating what caused the crash.

Sand spilled all over the highway, roads closed (Credit: NCDOT)

Click here for CBS 17’s live traffic map 🚦

CBS 17 was on the scene where sand was spilled all over the highway and crews are rushing to move the hazmat situation out of harm’s way.

NCDOT projects the road to reopen around 1 p.m., nearly 4 hours later.