Has NYC put an incorrect sign on the westbound Bruckner Expressway to trick visitors into taking the Triborough Bridge instead of the toll-free Third Avenue Bridge into Manhattan? [more inside]
posted by nicwolff on Sep 25, 2007 - 8 answers

While in St. Martin years ago, there were roadsigns that featured an exclmation point inside of a diamond shaped sign (?) or triangle (?). I often saw it on backroads and areas where there seemed to be no reason for concern. What does this sign mean, what is it called and where can I find images of it?
posted by Heatwole on Jan 14, 2005 - 9 answers