BATON ROUGE - Highland Road at Gardere Lane remains blocked after an 18-wheeler overturned and began to leak its cargo onto the roadway.

The road is closed to traffic between Staring Lane and Gardere Lane.

BRFD hazmat crews are still on the scene, but city-parish officials are advising motorists to take an alternative route while the cleanup continues.

Hazmat crews are working to clean up a type of herbicide, and the recovery operation is taking multiple hours as the remaining material must be offloaded to another truck before the overturned truck can be righted and moved.

The recommended detour around the crash site is to take Lee Drive to Burbank Drive to Siegen Lane, according to the city-parish.