https://www.fhwa.dot.gov/environment/bicycle_pedestrian/
FHWA Pedestrian and Bicycle Safety Materials
https://safety.fhwa.dot.gov/ped_bike/
FHWA Proven Safety Countermeasures
https://safety.fhwa.dot.gov/provencountermeasures/
Transportation Research Information Systems (TRIS)
http://www.trb.org/InformationServices/InformationServices.aspx
Countermeasures That Work
https://www.nhtsa.gov/sites/nhtsa.dot.gov/files/812202-countermeasuresthatwork8th.pdf
FHWA Clearinghouse
http://www.cmfclearinghouse.org/