UPDATE: Southbound access to the Sydney Harbour Tunnel has reopened following an overheight truck that stopped short of the tunnel entrance.
Earlier On Triple M
The Sydney Harbour Tunnel is closed southbound due to an over height vehicle stopped prior to the entry point.
Emergency response crews are in the midst of removing the truck.
Traffic approaching the Sydney Harbour tunnel is being diverted to the Sydney Harbour Bridge.
Traffic is heavy, expect delays.