There are a number of things to consider when approaching the scene of an accident. Some of these have been listed below:-
1) Dispatch to the incident - plan your route carefully
2) Weather and road conditions
3) Making a slow and safe approach
4) Parking defensively in the 'fend off position' if appropriate
5) Look for debris and hazards e.g fuel, downed electricity cables etc.
6) THINK SAFETY - SELF... Scene... and Survivers
7) Communication arrival to control and to other services in attendance
8) Assess the scene as you walk towards it, try to read the wreckage
9) Approach the scene only if it is safe
10) Look for casualties both on the road, in vehicles and walking around
11) Call for appropriate back-up and support where needed