The Bicycle Compatabilty Index was produced by the University of North Carolina Highway Safety Research Center for the Federal Highway Administration (FHWA).

“Bicyclists’ perceptions are the key to determining compatibility” is the foundation of the BCI. Yet, the research leading to the BCI did not measure actual bicyclists’ perceptions! Pedestrians (see photo above) and seated classroom subjects viewing defective films were used. Further, other research (see “Red Shoulders”) conducted by the same organization demonstrated that bicyclists’ perceptions can be completely opposite reality.

Critique of The Bicycle Compatibility Index details the fatal flaws in this procedure for rating the “bicycle compatibility” of a road.

The development study is no longer online at the address in the critique. It is now at:

The implementation manual is now at:

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