A truck has been parking illegally in front of my garage door in the alleyway behind the 3300 block of Monument on a constant basis. I've been unable to get my car out of the garage and then unable to park my park again on a regular basis. It appears the truck belongs to workers doing construction on apartment buildings. If they are going to ignore the "no parking in alley" signs the least they can do is not block people's garage doors. I've had to ask them to move constantly and they keep doing it. What is the best next step I should take since they won't listen to me? Call the police?