20thcentury 388 accesstoairports adaptation airportparking airportparkingfacilities airports attitudes automobiledrivers choiceoftransportation commuters employees employer-sponsoredtransportation europeanunioncountries flextime freightandfreightage greatbritain history labormobility localtransit management mathematicalmodels metropolitanareas paratransitservices parkingdemand planning psychological psychologicalaspects research residentialmobility ridesharing socialaspects socialconditions sociology statisticalservices statistics stress technologicalinnovations trafficflow transportation transportationengineering travel unitedstates urban urbantransportation wm172k86c1995