International Resources
SafetyCube (Safety CaUsation, Benefits and Efficiency)
https://www.safetycube-project.eu/
Effectiveness of Road Safety Engineering Treatments
https://www.onlinepublications.austroads.com.au/items/AP-R422-12
An Introductory Guide for Evaluating Effectiveness of Road Safety Treatments
https://www.onlinepublications.austroads.com.au/items/AP-R421-12
iRAP Road Safety Toolkit
http://toolkit.irap.org/
Austroads Road Safety Engineering Toolkit
http://www.engtoolkit.com.au/
United States Road Assessment Program
http://www.usrap.us/home/
The usRAP website includes risk map protocols, tools, and the underlying research behind the program.