Compléter 221-testVersion en ligne 221-test par Farhad Key 1 volume devaluation by segregation urban in sustainability Bay reduced off those longer within commerce principles A sustainable transportation system is one which people's needs and desires for access to jobs , , recreation , culture and home are accommodated using a minimum of resources . Applying of to transportation will reduce pollution generated by gasoline - powered engines , noise , traffic congestion , land , sprawl , economic , and injury to drivers , pedestrians and cyclists . In addition , the costs of commuting , shipping , housing and goods will be . Ultimately in a sustainable San Francisco , almost all trips to and the City will be on public transit , foot or bicycle ? as will a good part of trips to the larger Region . Walking through streets designed for pedestrians and bicycles will be more pleasant than walking through designed for the automobile . Street - front retail and commercial establishments will prosper from the large of foot traffic drawn to an environment enhanced trees , appropriately designed " street furniture , " ( street lights , bicycle racks , benches , and the like ) and other people . Rents and property costs will be lowered as land for - street parking is no required or needed .
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