Now is the time to call if no else has done so. 911 is prevalent through out the nation, but not all areas have it. If you use a cellular phone, you may reach a neighboring county. If need be, designate someone to call. Be prepared to give an exact location such as an Interstate, State, County or Township road number or name.
Most accidents happen at intersections, give a crossing road or the nearest one possible.
Give the dispatcher the number of vehicles involved The people hurt and if possible the extent of their injuries. The dispatcher always hangs up first. Check for injuries. You can do this by simply asking them their name. If they respond, encourage them not to move.