It may be necessary to move your vehicle if you cannot arrange for a tow truck.
Following a traffic accident, emergency services attempt to clear the road of wreckage as quickly as possible. It is most likely that your vehicle will be taken to an impound lot if it is involved in a crash and is inoperable. In no way is this an attempt to punish you, but rather to maintain the safety of the roadways for others.
Avoid accumulating storage fees by picking up your car as soon as possible.