Division 600 — Section 603
600-31 Section 603 — Category I Traffic Control Devices
603.1 Description 1 Provide, install, and maintain Category I traffic control devices. 603.2 Materials 603.2.1 Standard Traffic Cones 1 Use standard traffic cones included on the Approved Products List For Traffic Control Devices In Work Zones . 2 Ensure that standard sized cones are orange in color and have a minimum height of 28 in. and a maximum height of 36 in. Use standard traffic cones on the interstate system that have a minimum height of 36 in. Only those standard traffic cones supplemented with retroreflective collars are acceptable for use during the hours of darkness. Ensure that the reflectorization of standard traffic cones complies with Subsection 602.2.2. 603.2.2 Oversized Traffic Cones 1 Use oversized traffic cones included on the Approved Products List For Traffic Control Devices In Work Zones . 2 Ensure that oversized traffic cones are orange in color and have a minimum height of 42 in. and a maximum height of 50 in. 3 Ensure that each oversized traffic cone is a two- piece traffic control device with a breakaway design and consists of a cone and a rubber base. 4 Fabricate each oversized traffic cone from a low -density polyethylene plastic in a standard highway orange color. Ensure that the minimum diameter of the cone cylinder is 4 in. at the top of the cone and not less than 7½ in. at the bottom of the cone. Ensure that the bottom of each cone flares outward to form a flange for the rubber base to rest upon and provide stability. Ensure that the flange is no less than 10½ in. in diameter to prevent the bottom of the cone from easily passing through the rubber base. 5 Ensure that the minimum weight of the base, molded from recycled rubber, is not less than 15 lb and that the maximum width of the base is not greater than 18 in. Ensure that the diameter of the hole in the center of the base is ½ in. larger than the diameter of the cone cylinder at the bottom of the cone and not less than 2½ in. smaller than the cone flange. 6 Ensure that the reflectorization of the oversized traffic cones complies with Subsection 602.2.2 .