Any injury accident involving two or more road vehicles. The following types of injury accidents involving two or more road vehicles are: (a) Rear-end collision: collision with another vehicle using the same lane of a carriageway and moving in the same direction, slowing or temporarily halted Excluded are collisions with parked vehicles. (b) Head-on collision: collision with another vehicle using the same lane of a carriageway and moving in the opposite direction, slowing or temporarily halted Excluded are collisions with parked vehicles. (c) Collision due to crossing or turning: collision with another vehicle moving in a lateral direction due to crossing, leaving or entering a road, Excluded are collisions with vehicles halted and waiting to turn which should be classify ed under (a) or (b). (d) Other collisions, including collisions with parked vehicles: collision occurring when driving side by side, overtaking or when changing lanes; or collision with a vehicle which has parked or stopped at the edge of a carriageway, on shoulders, marked parking spaces, footpaths or parking sites, etc.