Top Guard Truncated Domes for FDOT T7364 in St. Petersburg (Pinellas County) January 7, 2016 Posted by on January 7, 2016June 6, 2017 Top Guard yellow detectable warnings installed +/-24 locations (+/-337 sq.ft.) in St.Petersburg (Pinellas County). FDOT contract T7364. LS Curb (Cone & Graham) as prime.