Top Guard Truncated Domes for FDOT T1579 in Ft. Myers (Lee County) June 17, 2014 Posted by on June 17, 2014June 6, 2017 Top Guard yellow detectable warnings installed +/- 260 sq.ft. at Colonial & US 41 in Ft. Myers (Lee County) for FDOT contract T1579. Florida Safety Contractors as prime.