When I worked in FL we towed anytime the driver was unable to remove the vehicle. If the person wasn't able to get someone there within about 15 minutes the car was towed for safekeeping, but it was not impounded. The person could literally call a cab, go to the tow yard, and pick the car up as soon as it arrived. The way the city attorney looked at it was if we require the person to park the car in a parking lot then it was subsequently damaged or stolen we might be held liable. If we took the necessary precautions and placed the car in a secured location like the tow company's yard, we could transfer at least some liability to the tow company.
But when a long train of abuses and usurpations, pursuing invariably the same object, evinces a design to reduce them under absolute Despotism, it is their right, it is their duty, to throw off such Government, and to provide new guards for their future security.
Translation for the intellectually challenged: If the government screws the people too much, it is the right and duty of the people to revolt and form a new government.