http://www.cmfclearinghouse.org/
FHWA Speed Management Resources
https://texasshsp.com/wp-content/uploads/2019/07/SpeedMgmt.Resources-NSE-7-2-19.pdf
Countermeasures That Work
https://www.nhtsa.gov/sites/nhtsa.dot.gov/files/812202-countermeasuresthatwork8th.pdf
Transportation Research Information Systems (TRIS)
http://www.trb.org/InformationServices/InformationServices.aspx
FHWA Proven Safety Countermeasures
https://safety.fhwa.dot.gov/provencountermeasures/