The group also complained that the transportation compromise combines several biking and pedestrian program into a single "transportation alternatives" program.
The decision "drastically" reduces funding that would have been available under the Senate's original $109-billion proposal for the transportation bill, America Bikes said.
"Eligibilities such as road uses and environmental mitigation have been added to Transportation Alternatives, making it harder for local communities to compete for funding for local biking and walking projects," the group said. "This two-year bill represents a major step backwards in transportation policy for transportation choices and healthy physical activity."
Lawmakers are reviewing the conference committee's report on the transportation bill, which was released early Thursday morning. They have until Saturday to approve the measure in both chambers of Congress before the scheduled expiration of the current funding for transportation projects.