As well you should. It is a service (and one that the city seems to be able to do effectively) that the city provides to discourage double parking. The signs must be posted 48 hours in advance. We had 3 cars towed the morning of our move, 3 cars who willingly parked there the night before, having signs and caution tape posted to alert them. Responsibility is a thing, and folks can learn the hard way sometimes.