A contraflow bike lane is one where bicycles are directed to go against the flow of traffic.
Itir Sonuparlak reports on the controversial strategy:
"Those against the idea argue on the basis of traffic laws, safety, directing resources away from automobiles and even based on the cost of new signage. However, supporters of contraflow bike lanes argue that they would open up one-way streets to cyclists, allow for two-way bike traffic, increase convenience of bike travel and safety, and slow down traffic by narrowing the road."
The inclusion by the FHA in their Manual on Uniform Traffic Control Devices (MUTCD) gives contraflow bike lanes some legitimacy.
Thanks to Jeffrey Riecke