First take care of the fire on the bus and get an overview about the condition of the injured. Let a policeman set up a warning sign on the side of the highway, in order to slow down the oncoming traffic.
Afterwards you can get the police to close off the highway completely.
Not all the injured must be moved with rescue helicopters.
The injured in the two auto wrecks must first be quickly freed with your metal cutters before they can be treated and moved.