contraflow

noun2

1. •
   Flow in the opposite direction to normal.

   • Example: Contra-flow cycling is most often applied on basic cycle network links in low-speed local access roads, both within and outside the built-up area (European English)
   • Example: Contra-flow cycling is a regulatory measure. In streets and roads with a one-way traffic restriction, cyclists are exempt from the one-way restriction and are allowed to drive against the flow of motorized traffic. (European English)
2. •
   An abnormal state of a road or motorway where the traffic temporarily travels in the opposite direction to normal, usually as a result of repair work or an accident.