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At 02:41 AM 10/19/2000 GMT, you wrote: >Dear UTSG members, >I'm working as Research Associate with Asian Institute of Technoplogy, >Thailand. I do some research on least cost strategy on Urban >trandsportation planning to minimize the emission level. If any of the >member, please help me to find some existing work on least-cost strategies >or any optimization model on Urban transportation planning I would very much >appreciate. See the chapter "Least Cost Transportation Planning" in the Online TDM Encyclopedia, available free at our website. It describes the concept and lists related literature, including some documents posted on the Internet. As always, we appreciate feedback. When applying least cost planning, I think it is important to avoid optimizing for just one objective. Traditional traffic engineering tends to optimize only for traffic congestion reduction, resulting in programs and policies that exacerbate other transportation problems (i.e., they reduce access and travel choice, and increase parking costs, crashes, consumer costs, pollution and sprawl). Similarly, optimizing for just emission reductions can lead to programs and policies that that exacerbate other problems, such as traffic congestion, crashes, consumer costs, etc. Put another way, it is important to use a comprehensive model that identifies opportunities to solve multiple problems at once. Sincerely, Todd Litman, Director Victoria Transport Policy Institute "Efficiency - Equity - Clarity" 1250 Rudlin Street Victoria, BC, V8V 3R7, Canada Phone & Fax: 250-360-1560 E-mail: [log in to unmask] Website: http://www.vtpi.org %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%