Highway Maintenance Response Time Standards

DRAFTPavements. If they are not sealed on a regular basis, water infiltrates thesubgrade and leads to serious degradation of the shoulder and possibly theadjacent pavement.All PavementsDrainageClosed drainage systems and ditches should be cleaned out on a 10 year cycle.Failure to do that will lead to flooding in the case of closed systems and floodingand subgrade saturation in the case of ditches. Both scenarios will lead topavement degradation.Bridge Maintenance GuidancePreventive or “cyclical” maintenance activities and selection criteria are well established.TMD has tracked annual cyclical maintenance efforts and compared accomplishmentsto the average annualized need using bridge inventory data. Specific guidance forbridge cyclical maintenance is given as follows:Cyclical ActivityBridge WashingDeck SealingBearingLubricationBridge PaintingDeck OverlaySelection CriteriaAll functional structures, priority to structures overhighwaysConcrete wearing surfaces (Present wearing surfacecodes 02, 03, 06, 12, 22, 32, 42, 45, 52 in RC15 ofBDMS ) rated 5.0 on structures rated 4.5 to 7.Steel bearings (Bearing codes 02, 03, 04, 05, 06, 07,22, 52,5 3, 64 in RC15 of BDMS) on structures rated4.5 to 7Painted Structures (Coating Types 1, 2, or 3 in RC15of BDMS) on structures rated 4.5 to 7.Wearing surfaces (Present Wearing Surface codes04, 14, 24, 34, 44, 54, 64 in RC15 of BDMS ) onstructures rated 4.5 to 7.Cycle2 years4 years4 years12 years12 years8