Top Guard Truncated Domes for FDOT T2603 in Gainsville (Alachua County) June 15, 2016 Posted by on June 15, 2016June 20, 2017 FDOT contract T2603. Top Guard red detectable warnings installed +/-11 locations (+/-162 sq.ft.) in Gainsville (Alachua County) along SR 26. Florida Safety Contractors as prime.