Parking limited

I see these signs all the time when I walk home from school. There must be at least 6 or something on one side of the street, maybe more. This sign uses a vibrant color red to draw the viewer's attention and make clear that they cannot park on this side of the street at certain times. The use of all capital letters emphasizes the importance of this parking issue, and gives an authoritive feel to the sign. The text is centered nicely. Furthermore, they use symbols to show what will happen if you park on the street during school hours. The only thing that stinks is that my friends cannot park in front of my house during school, and must park across the street.
p.s. I'm not sure why this picture is turned sideways, in my i-photo it's upright and correct.