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Transportation Modes and Their Roles
Transportation Modes Costs
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action air pollution Angeles annual approximately areawide auto average benefits Boston Boston Redevelopment Authority Btu/Vm budget buses carbon monoxide carpools cars central cities cents commuting costs congestion decrease Department of Energy Department of Transportation downtown driving habits emissions employees Energy Conservation Environmental estimated Exhibit facilities federal government Federal Highway Administration freeway fuel consumption fuel efficiency future gasoline Houston impact implement improve individuals involved mass transit systems ment mileage miles traveled million mobility motorists nitrogen oxides occupancy on-street parking operating costs parking spaces passenger peak-period percent reduction population portation problems projected Rail ramp metering reduce Report rescheduling Research restrictions result reversible lanes ridership ridesharing road maintenance roadway role safety savings Source speed streets subsidies suburban suburbs tion traffic engineering trans transportation modes trips U.S. Department United States Department urban areas urban travel vanpool vanpool programs vehicle miles Washington