Tom Vanderbilt
Bambang Susantono
United States. General Accounting Office
Alice Schertle
Rahardjo Adisasmita
Dept.of Transport
Andrew Street
Richard L. Oram
Roberta Remak
Anders Gullberg
Traffic Congestion and Traffic Safety in the 21st Century
Unknown Author
Mark E. Hallenbeck
Harry Ward Richardson
San Francisco County Transportation Authority.
United States. Congressional Budget Office
Maxwell Nicoll Halsey
Paul Fleischman
United Nations.
American Transit Association