Center line markings should also be placed on other traveled ways where an engineering study indicates such a need.ġ1 Engineering judgment should be used in determining whether to place center line markings on traveled ways that are less than 16 feet wide because of the potential for traffic encroaching on the pavement edges, traffic being affected by parked vehicles, and traffic encroaching into the opposing traffic lane.ġ2 Center line markings may be placed on other paved two-way traveled ways that are 16 feet or more in width.ġ3 If a traffic count is not available, the ADTs described in this Section may be estimates that are based on engineering judgment. ![]() Center line markings should also be placed on all rural arterials and collectors that have a traveled way of 18 feet or more in width and an ADT of 3,000 vehicles per day or greater. Center line markings shall also be placed on all paved two-way streets or highways that have three or more lanes for moving motor vehicle traffic.ġ0 Center line markings should be placed on paved urban arterials and collectors that have a traveled way of 20 feet or more in width and an ADT of 4,000 vehicles per day or greater. The UVC can be obtained from the National Committee on Uniform Traffic Laws and Ordinances at the address shown on Page i.Ġ9 Center line markings shall be placed on all paved urban arterials and collectors that have a traveled way of 20 feet or more in width and an ADT of 6,000 vehicles per day or greater. Two-direction no-passing zone markings consisting of two normal solid yellow lines where crossing the center line markings for passing is prohibited for traffic traveling in either direction.Ġ5 A single solid yellow line shall not be used as a center line marking on a two-way roadway.Ġ6 The center line markings on undivided two-way roadways with four or more lanes for moving motor vehicle traffic always available shall be the two-direction no-passing zone markings consisting of a solid double yellow line as shown in Figure 3B-2.įigure 3B-2 Examples of Four-or-More Lane, Two-Way Marking ApplicationsĠ7 On two-way roadways with three through lanes for moving motor vehicle traffic, two lanes should be designated for traffic in one direction by using one- or two-direction no-passing zone markings as shown in Figure 3B-3.įigure 3B-3 Examples of Three-Lane, Two-Way Marking ApplicationsĠ8 Sections 11-301(c) and 11-311(c) of the "Uniform Vehicle Code (UVC)" contain information regarding left turns across center line no-passing zone markings and paved medians, respectively. ![]()
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