Emergency crews have reduced traffic to single lane in both directions along Highway 97 near Dry Valley Road, following a two vehicle collision.
An emergency official told a Castanet reporter that a truck headed north had hydroplaned and then crashed into a car in the outside lane.
Both vehicles smashed into the cement median causing significant damage, and will need to be towed from the scene.
Four people were taken to hospital with undetermined injuries.
Traffic was backed up for about two hours.