Emergency Services remain at the scene of a serious crash on Christchurch’s Southern Motorway this morning.

Canterbury police say a moped collided with an unoccupied broken-down vehicle on the side of the motorway, near the Annex Road underpass about 6.40am.

Eye witnesses have reported seeing the moped “crushed” on the side of the road.

Police are taking photos of the accident scene.

Both eastbound lanes are open, however westbound traffic is reduced to one lane.