If using a cell phone is your only option, call 911.
Only consider leaving a car that is in contact with a downed power line if the vehicle catches on fire. If that happens:
Open the door, but do not step out.
Make sure that you jump completely free of the vehicle with both feet together to avoid contact with the live car (metal) and the ground at the same time, which would create a circuit and cause electrocution.
Hop as far away as possible away from the vehicle while keeping both feet together.
If you encounter an accident involving a utility pole
Never approach a vehicle that is touching power lines; instead call 911 immediately.
Remain a safe distance away, keep the passengers in the vehicle calm and wait for emergency personnel to handle the situation.
Additionally,never drive over downed power lines. Even if not energized, lines can become entangled in your vehicle. Also, never touch a person who is in contact with power lines or other objects that are touching power lines.