It is funny noting the differences in tone you see in road signs from state to state. On a road trip years ago my wife and I noted a difference between Texas and New Mexico. In Texas, the highway signs say NO PASSING or PASSING ZONE, and the motto greeting you on entry is DON'T MESS WITH TEXAS. When you pass into New Mexico, the motto is Land of Enchantment, and the highway signs say things like "Pass with care!" and "Courtesy costs nothing!". So basically we found much humour in the contrast between Texas' hepped-up macho bravado and New Mexico's Disneyish metrosexual sensitivity.