1Department of Transportation. Traffic Safety Report [ M ]. USA : 1994.
2Michiel M Minderhoud, Piet H L Bovy. Extended time - to - collision measures for traffic safety assessment [ J ]. Accident A- nalysis and Prevention,2001 ( 33 ) : 89 - 97.
3Zegger C V, Deen R C. Identification of Hazardous Location on City Streets[ M ]. Traffic Quarterly, 1977.