How about this solution:
While detecting any parked car, after 10 seconds, playing a message of
It could be a simple speaker, or a combination of a speaker and some kind of large text display (hearing impaired people and to make sure no-one misses the message).
Message repeats a few times, until plugged in, then
If not plugged in after two minutes (or whatever time trials make it seem reasonable), the message will change to
This system would add cost to the charging spot, however some solution would be necessary to warn people in a very clear way that what they are doing is not acceptable.
If you want to take it a bit further, then optical recognition of the license plate, and adding the registration to the tow warning message, might make it even more powerful.
While detecting any parked car, after 10 seconds, playing a message of
It could be a simple speaker, or a combination of a speaker and some kind of large text display (hearing impaired people and to make sure no-one misses the message).
Message repeats a few times, until plugged in, then
If not plugged in after two minutes (or whatever time trials make it seem reasonable), the message will change to
This system would add cost to the charging spot, however some solution would be necessary to warn people in a very clear way that what they are doing is not acceptable.
If you want to take it a bit further, then optical recognition of the license plate, and adding the registration to the tow warning message, might make it even more powerful.
