Two big rigs involved in a collision on Interstate 80 in Alta have closed the westbound lanes of interstate 80 and traffic is being detoured through Nevada County on Highway 20. Fire engines have been called to the scene as at least one of the trucks was reported on fire. It’s loaded with hay. The accident was first reported at 5:12 this morning. Interstate 80 at Crystal Springs in the Alta area is still closed so expect some heavier traffic on Highway 20/49 through Nevada County as that is the detour until Interstate 80 can be opened again.