GridLock Traffic Systems, Inc. Search | Advanced Search | New Members | Coupons and Discounts | All Categories Related Categories A - ZSubcontractorsConstruction ServicesTraffic ControlConstruction SuppliersTraffic Control DevicesContractorsPavement MarkingINDOT Prequalified Contractors as of 11/01/2024E(D) Traffic Control: Sign InstallationE(G) Traffic Control: Pavement Markings Other >> A - Z >> Subcontractors GridLock Traffic Systems, Inc. 6400 Massachusetts AveIndianapolis, IN 46226 | map | directions (317) 541-2727 Visit Site Connect With Us