Those bright blue signs with a question mark on them are a nod to the Hudson Valley's past, but still lead motorists to an enlightening destination. The blue question mark became the universal symbol telling motorists, "Need information? Along Route 9 in Poughkeepsie, the old question mark signs direct motorists to Destination Dutchess, the county's official tourism office on Neptune Road. Those blue question marks would lead the way. So the next time you're driving Route 9 and see that oversized white question mark, you'll know exactly what it means.