1. 2009 Public Transportation Fact Book;American Public Transit Association [APTA],2009
2. TCRP Synthesis 52: Transit Operator Health and Wellness Programs;Davis,2004
3. Work-related road safety: An analysis based on U.K. bus driver performance;Dorn;Risk Analysis,2008
4. Determinants of bus dwell time;Dueker;Journal of Public Transportation,2004
5. 2007 Safety and Security Statistics;Federal Transit Administration [FTA],2009