What are they?
 Pavement edge line markings are used to delineate the pavement edge providing a guide for drivers. Where the line is to the right of the lane, the edge line is white and where the line is to the left of the travel lane it is yellow.
Where should they be used?
Edge lines may be used on rural or secondary highways to delineate the pavement edge from the gravel shoulder area where it has been determined, after a review of the accident history, that edge lines would be beneficial to improving the safety of the roadway.In instances where the shoulder is paved, and to separate the shoulder from the travelled lane, edge lines may be used at the following locations:
- where the shoulder is paved and is of similar texture and color to the pavement on the travelled lane; in advance of and over narrow bridges; in advance of and around sharp curves; in merging and diverging areas; at pavement width transitions; where obstructions on the shoulder are close enough to the pavement edge to constitute a hazard to the motorist;
- where unusual physical conditions exist.
Pavement edge lines should not be used in instances where there are concrete curbs and/or sidewalks installed and where the edge of the travelled lane is clearly identified. They should not be continued through intersections and should not be broken for driveways.
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