UPDATE: 1:45 p.m. All lanes on the Nueces Bay Causeway have reopened.
A traffic accident just before the Harbor Bridge heading south on US 181 has caused lane closures and traffic delays.
Currently, all three lanes of US 181 southbound near the Burleson Street exit are closed and the left lane of US 181 northbound near the Burleson Street exit is closed.
US 181 southbound traffic in this area is now being detoured to the Beach Street exit.
Crews are expecting clean-up to continue in the area for several hours.
All lanes currently closed are expected to be open by late this afternoon.
Drivers headed to Corpus Christi from the Portland area can go through Sinton / Odem of travel through Port Aransas on the ferry.
Drivers are urged to be aware of the lane closures, to consider using alternate routes, to follow all traffic control devices, and to slow down in the work zone areas.
Numerous agencies are working hard to clear U.S. 181 South bound lanes Portland??Corpus Christi. If you are coming in from Portland. Truck Crash on South Bound 181 blocking all lanes. Vehicles being routed off 181 Burleson exit. pic.twitter.com/OTI3C1Te4Z