- Organisation for Economic Co-operation and Development countries (11)
- Choice of transportation--Congresses (5)
- Transportation--Europe--Congresses (4)
- Urban transportation--Congresses (4)
- Transportation and state--Europe--Congresses (3)
- Transportation--Planning--Congresses (3)
- Urban transportation--Europe--Congresses (3)
- City traffic--Congresses (2)
- Delivery of goods--Congresses (2)
- High speed trains--Europe--Congresses (2)
- Infrastructure (Economics)--Europe--Congresses (2)
- Transportation--Europe--Finance--Congresses (2)
- Transportation--Europe--Planning--Congresses (2)
- Aged--Transportation--Congresses (1)
- Automobile industry and trade--Forecasting--Congresses (1)
- Automobile ownership--Forecasting--Congresses (1)
- Bus lines--Congresses (1)
- Bus lines--Europe--Congresses (1)
- Business cycles--Europe--Congresses (1)
- Coastwise shipping--Europe--Congresses (1)
- Environmental policy--European Economic Community countries--Congresses (1)
- Europe--Economic policy--Congresses (1)
- Freight and freightage--Congresses (1)
- Freight and freightage--Europe--Congresses (1)
- Freight and freightage--Europe--Costs--Congresses (1)
- Freight and freightage--France--Congresses (1)
- Freight and freightage--Goverment policy--Congresses (1)
- Freight and freightage--Netherlands--Congresses (1)
- Freight and freitage--Government policy--Europe--Congresses (1)
- Frights and frightage--Europe--Communication systems--Congresses (1)
- Handicapped--Transportation--Congresses (1)
- Holidays--Europe--Congresses (1)
- Inland water transportation--Europe--Congresses (1)
- Land use--Planning--Congresses (1)
- Local transit crime--Europe--Congresses (1)
- Local transit--Congresses (1)
- Local transit--Cost of operation--Congresses (1)
- Local transit--Europe--Congresses (1)
- Local transit--Fares--Congresses (1)
- Local transit--Finance--Congresses (1)
- Merchant marine--Europe--Congresses (1)
- Personal rapid transit--Europe--Congresses (1)
- Physical distribution of goods--Europe--Congresses (1)
- Piggyback transportation--Congresses (1)
- Piggyback transportation--Europe--Congresses (1)
- Population forecasting--Europe--Congresses (1)
- Privatisation--Europe--Congresses (1)
- Railroads --Europe--Deregulation--Congresses (1)
- Railroads and state--Europe--Congresses (1)
- Railroads--Economic aspects--Europe--Congresses (1)
- Regional planning--Europe--Congresses (1)
- Roads--Finance--Congresses (1)
- Round Table on Transport Economics, 43d, Paris, 1978 (1)
- Rural transit--Europe--Congresses (1)
- Shipment of goods--Europe--Data processing--Congresses (1)
- Shipment of goods--France--Congresses (1)
- Shipment of goods--Netherlands--Congresses (1)
- Shipments of goods--Europe--Congresses (1)
- Speed limits--Congresses (1)
- Speed limits--Cost effectiveness--Congresses (1)
- Street-railroads--Congresses (1)
- Substitution (Technology) (1)
- Telecommunication (1)
- Time management--Congresses (1)
- Toll roads--Congresses (1)
- Tourist trade--Europe--Congresses (1)
- Traffic engineering--Great Britain--Congresses (1)
- Traffic flow--Congresses (1)
- Traffic safety--Cost effectiveness--Congresses (1)
- Traffic safety--Europe--Congresses (1)
- Transit International--Europe--Congresses (1)
- Transit, International--Europe--Congresses (1)
- Transition--Europe--Finance--Congresses (1)
- Transport workers--Europe--Congresses (1)
- Transportain--Europe--Forecasting (1)
- Transportation (1)
- Transportation and state--Congresses (1)
- Transportation policy--Environmental assetts--European Economic Community countries--Congresses (1)
- Transportation, Automotive--Forecasting--Congresses (1)
- Transportation, Automotive--Great Britain--Congresses (1)
- Transportation--Congresses (1)
- Transportation--Cost effectiveness--Congresses (1)
- Transportation--Deregulation--Congresses (1)
- Transportation--Energy conservation--Congresses (1)
- Transportation--Energy consumption--Congresses (1)
- Transportation--Europe--Labor productivity--Congresses (1)
- Transportation--Europe--Technological innovations--Congresses (1)
- Transportation--Forecasting--Mathematical models--Congresses (1)
- Transportation--Germany--Congresses (1)
- Transportation--Germany--Evaluation--Congresses (1)
- Transportation--Netherlands--Congresses (1)
- Transportation--Netherlands--Evaluation--Congresses (1)
- Transportation--Passenger traffic--Congresses (1)
- Transportation--Social aspects--Germany--Congresses (1)
- Transportation--Social aspects--Netherlands--Congresses (1)
- Transportation--Technological innovations (1)
- Travel time (Traffic engineering)--Congresses (1)
- Truck drivers--Europe--Congresses (1)
- Trucking--Congresses (1)
- Trucking--Europe--Labor productivity--Congresses (1)
- no value (9)