I used the signs when I moved a few weeks ago. There’s also a number for parking enforcement printed on the sign that you can call if people are in violation. Not suprisingly, there were cars parked in the no parking area. However, I decided not to call to report them. I figured everyone on the block would know that I was the one who had my neighbors’ cars towed and that didn’t seem like the best way to introduce myself to the neighborhood. The movers had to walk about another 20 or 30 feet, but it seemed like they run into this all the time so they didn’t complain. If there hadn’t been space further down the block, I would have called.