1. Bang K L, Ronggui Z, Huichen X 1998 Traffic performance and passenger car equivalents for road links and township roads in PRC, Proc. Third International Symposium on Highway Capacity, (Copenhagen: Danisu Road Directorate) 257–273
2. Transportation Research Record;K. L. Bang,1995
3. CRRI 1982 Road user cost study in India, Final Report (New Delhi: Central Read Research Institute)
4. Cunagin W D, Messer C J 1982 Passenger car equivalents for rural highways, Report FHWA/RD-82/132 (Washington, DC: FHWA, US Department of Transportation)
5. Transportation Research Record;J. Fazio,1999