How are the passing and no passing sections determined on rural highways?
Sections of two lane rural highways where passing is permitting in the opposing lane, (indicated by the presence of a dashed yellow line), is determined by using established guidelines where specific sight distance available to the motorist is measured. As long as an adequate sight distance is met, as determined by a field crew, passing is permitted. The actual sight distance varies with the speed limit, for example at 100km/h the minimum sight distance is 400m. The general procedure is outlined in the Manual of Uniform Traffic Control Devices for Canada, so that all road agencies use the same general principals, resulting in passing zones on the national road network being consistently applied.
