Abstract directional symbols like pointed arrows or the written words "left" and "right" do not have the same effect. Images of pointing fingers are much better at diverting people's attention ...

means that you cannot park to the left of the sign at any time. “Tow-Away No Parking 6 p.m. to 3 a.m.” (arrow pointing right) means that you cannot park to the right of the sign during the ...