Time to Collision - nsaunier/WikiSMoS GitHub Wiki
The most common surrogate measures of safety is the time to collision (TTC). It is used for example in (Ismail 2010; Laureshyn 2010).
Ismail, K. 2010. “Application of Computer Vision Techniques for Automated Road Safety Analysis and Traffic Data Collection.” PhD thesis, University of British Columbia. http://hdl.handle.net/2429/29546.
Laureshyn, A. 2010. “Application of Automated Video Analysis to Road User Behaviour.” PhD thesis, Lund University. http://lup.lub.lu.se/luur/download?func=downloadFile&recordOId=1522969&fileOId=1522970.