This dimension should be increased when markers are attached behind a steel ribbon guardrail such that the full length of the retroreflective strip is clearly visible above it. Where there are no shoulders, a minimum lateral clearance of 1.2m to the edge of the adjacent traffic lane should be provided where practicable.Įdge marker posts should be placed vertically with the top of the post 900mm above the edge of the adjacent traffic lane. Posts should be placed at a uniform lateral distance no more than 3m from the edge of the adjacent traffic lane. View larger image Location and spacingĮdge marker posts should be placed to produce a smooth flowing pattern of delineation that defines the edge of the trafficable portion of the roadway. For illustrations of edge marker post details refer to Figure 2‑13.įigure 2‑13: Details of edge marker posts and retroreflective strips However, post spacing may be adjusted by up to 20% to clear driveways, side roads or other obstructions. The retroreflective strips should not be attached to poles, fence posts, signposts, trees, abutments or the like, as doing so would destroy the desirable systematic spacing intended. Retroreflective strips must only be attached to properly prepared posts. Refer to the Specification M14: edge marker posts for material, assembly, and dimension specifications for edge marker posts. may be installed on lower volume rural local authority roads.Įdge marker post retroreflective strips on the left-hand side of the road must be white and on the right-hand side of the road must be yellow.should be installed on all rural state highways, and higher volume rural local authority roads and.for consistency, are required to comply with Specification M14: edge marker posts.must conform with the requirements in Schedule 1 of the TCD Rule and.Edge marker posts provide useful guidance for drivers but are not a substitute for standard warning signs.Įdge marker posts should be installed on rural roads with consideration given to sealed versus unsealed and varying volumes as recommended in Table 2‑25. Edge marker posts are typically fitted with retroreflective devices that form a primary aid for night-time driving. This section discusses the use of edge marker posts (EMPs) on straights. For use on curves refer to the treatment of curves.Įdge marker posts (EMPs) are used on rural roads to delineate the alignment of the road ahead, especially horizontal and vertical curves.
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