A pedestrian may walk against traffic (on the left side of the road), if there aren't sidewalks.
A traffic rule can be defined as an accepted and enforceable law or guideline established by a road safety agency, so as to give warnings and instructions to road users such as:
In accordance with national traffic rules and regulations, a pedestrian is permitted by law to walk against traffic, especially on the left side of the road) if there aren't sidewalks.
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