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International Travel
The United Nations World Tourism Organization (UNWTO) reports that in 2012, for the first time, 1 billion people traveled across their national borders—a comprehensive demonstration that there is an ever-increasing desire and propensity to travel farther from home and ...
- Administration, Operations, and Evaluation
- Adopt-a-Highway Program
- Air Traffic Flow Management
- Aircraft Maintenance
- Airline Flight Reservations and Ticketing Systems
- Airline Flight Scheduling
- Airline Marketing
- Airline Passengers
- Airline Service Quality Modeling
- Airport Administration
- Airport Gate Assignment Problems
- Airport Operations and Marketing
- Bridge Maintenance, Repair, and Replacement
- Bus Capacity
- Bus Routes
- Bus Scheduling
- Carpooling
- Construction Management
- Construction Management, Public Relations and
- Freight Handling
- Harbors and Ports, Administration and Operations of
- High Occupancy Toll Lanes
- High Occupancy Vehicle Lanes
- Inland Waterways, Traffic Management and
- International Customs and Duties
- Just-in-Time Systems
- Parking Planning and Management
- Parking Regulation and Enforcement
- Parking Revenue and Collection
- Pavement Management Systems
- Planning, Programming, and Budgeting Systems
- Port Inspections
- Rail Corridor Congestion
- Risk Analysis/Assessment
- Spatial Equity Analysis
- Supply-Chain Management
- Taxicab Licensing and Regulation
- Telematics
- Traffic Demand Management
- Traffic Impact Assessments
- Traffic Information and Control Systems
- Traffic Management Systems
- Traffic Mitigation Programs
- Traffic Monitoring
- Traffic Signal Priority
- Traffic Signals
- Transit Cost Allocation Models
- Transit Fares, Media and Collection Systems and
- Transit Information Systems
- Transit Management and Operations
- Transit Performance Monitoring and Evaluation
- Transit Priority Measures
- Transit Systems Analysis
- Transit Systems, Marketing Research and Public Relations for
- Transit Systems, Service Quality of
- Transit Vehicle Capacities, Loading Criteria and
- Transportation Control Measures
- Transportation Impact Analysis
- Trucking Industry
- Trucking, Computer Monitoring Systems and
- Trucking, Owner-Operators and
- Air Transportation Systems
- Economics of Transportation
- Airline Fares
- Automobile Industry, Economics of
- Automobile Insurance
- Automobile Operating Costs
- Benefit–Cost Analysis of Transportation
- Economic Development
- Economics of Air Travel
- Economics of On-Street Parking
- Fiscal Politics
- Freight Rates/Tariffs
- Privatization of Public Transit
- Railroad Industry, Economics of
- Transit Industry, Economics of
- Transportation, Economics of
- Travel Pricing
- Trucking Industry, Economics of
- Value Pricing
- Energy, Environmental, and Health Impacts
- Air Pollution, Automobiles
- Air Pollution/Air Quality
- Aircraft Engine Emissions
- Airports, Environmental Issues and
- Alternative Automotive Fuels
- Alternative Fuels
- Automobile Emissions Controls
- Bicycling, Health and Recreational Aspects of
- Biodiesel
- Biofuels
- Carbon Dioxide Emissions
- Carbon Monoxide Emissions
- Climate Change, Transportation Impacts From
- Diesel Fuel Vehicles
- Dredging
- Emissions Modeling
- Emissions Trading Schemes
- Energy Costs
- Environmental Impacts
- Ethanol
- Gasoline, Reformulated
- Green Fuels
- Green Transportation
- Greenhouse Gases
- Harbors, Environmental Issues
- Health Issues
- Hydrogen Fuel
- Lead Pollution
- Light Pollution
- Liquefied and Compressed Natural Gas
- Mobile Emissions
- National Ambient Air Quality Standards
- Nitrogen Oxides
- Noise Pollution and Airplanes
- Noise Pollution and Cars
- Particulate Matter
- Road Ecology
- Smog
- Sulfur Dioxide
- Vehicle Emissions Standards
- Vehicle Fleet Emissions
- Visual Pollution
- Volatile Organic Compounds
- Water Pollution
- Facilities and Infrastructure
- Access Roads
- Airport Hubs
- Airport Parking and Ground
- Airport Passenger Terminals
- Bicycle Facilities
- Bikeways/Bike Lanes, Road Design Issues of
- Bridges, Condition of
- Bus Stops/Shelters
- Busways and Reversible Bus Lanes
- Canals and Locks
- Collector Streets
- Freight Terminals
- Greenways
- Harbors and Ports, Administration and Operations of
- High Speed Highways
- Highway Construction and Maintenance
- Highway Landscaping
- Highway/Road Capacity
- Highways, Rural and Low-Volume
- Historic Transportation Facilities
- Interchanges, Modal
- Intersections
- Interstate Highway System
- Maritime Industry
- Parking Lots
- Parking Structures
- Pedestrian Malls and Skywalks
- Road Signage
- Roundabouts and Traffic Circles
- Scenic Roads and Parkways
- Sidewalks
- State Highway Planning and Finance
- Traffic Congestion
- Traffic Signals
- Train Stations, Economic of
- Transit Centers
- Transit Lines/Networks
- Transit Tunnels, Design and Construction of
- Transitways
- Upstream Signalized Crossovers
- Urban Trail Systems
- Urban Walkways
- Wildlife Crossings and Barriers
- World Container Ports
- Intermodal Transportation Systems
- International Transportation and Policy
- International Air Passenger Transport
- International Customs and Duties
- International Rail Transit
- International Travel
- International Waters
- Transportation Policies, African
- Transportation Policies, Asian
- Transportation Policies, European
- Transportation Policies, North American
- Transportation Policies, South and Central American
- Labor Issues/Employee Relations
- Planning and Policy
- 3-C Planning Process
- Airport Planning
- Automobile Access Programs
- Bicycle Sharing
- Carpool Programs, Ride-Sharing and
- Complete Streets
- Congestion Mitigation and Air Quality Program
- Deregulation
- Evacuation Planning
- Federal Transportation Policy
- FreedomCAR and Vehicle Technologies Program
- Geographic Information Systems in Transportation
- Harbor and Port Planning
- High Speed Rail, Policy and Planning of
- Highway Aesthetics
- Highway Planning
- Highway Removal
- Hypersonic Flight
- Inland Waterways, Planning and
- Interstate Highway System
- Job Access and Reverse Commuting Program
- Livable Streets
- Metropolitan Planning Organizations
- Neotraditional Neighborhoods and Transportation Impacts
- Next Generation Airports, Federal
- Park-and-Ride/Kiss-and-Ride Lots
- Parking Generation Rates
- Parking Planning and Management
- Partnership for a New Generation of Vehicles
- Pedestrian-Friendly Design
- Planning, Programming, and Budgeting Systems
- Public Participation in Transportation Planning
- Rails-to-Trails Programs
- Regional Transit Agencies
- Regional Transportation Planning
- Regional Transportation Planning Organizations
- Regional Transportation Plans
- Road Inventory
- Smart Growth
- State Implementation Plans
- State Transportation Planning
- Surface Transportation Program
- Traffic Noise Abatement
- Traffic Studies and Surveys
- Transit Corridor Planning
- Transit-Oriented Development
- Transportation Impacts on Land Use
- Transportation Improvement Programs
- Transportation Plan Implementation, Monitoring, and Evaluation
- Transportation Planning
- Transportation Planning and Politics
- Transportation Statistics and Databases
- Trip Reduction Programs
- Safety and Security
- Air Traffic Control
- Air Travel Regulations, History of
- Aircraft Maintenance Training Programs
- Airplane Disasters
- Airplane Pilot Licensing
- Airplane Pilot Training
- Airport Security
- Automated Traffic Enforcement
- Automobile Accidents and Prevention
- Automobile Safety Inspections and Registration
- Automobile Safety Systems
- Aviation Safety, Dangerous Goods Transport and
- Bicycle Safety
- Collision Avoidance Systems, Airplanes
- Collision Avoidance Systems, Automobile
- Distracted Driving
- Driver Licensing
- Driver Licensing, Commercial
- Elderly Driver Safety Issues
- Emergency Response Systems
- Emergency Transportation Planning and Operations
- Emergency Vehicles
- Federal Automobile Safety Standards
- GPS
- Harbors and Port Security
- Hazardous Materials Transport
- Helicopters, Emergency Response and Law Enforcement
- High Speed Rail, Safety Issues of
- Highway Safety Barriers and Traffic Barriers
- Impaired Driving
- Incident Detection Systems, Airplanes
- Incident Detection Systems, Automobiles
- Motorcycle Safety
- Nonmotorized Vehicles, Safety Issues of
- Passenger Van Safety
- Pedestrian Safety
- Pedestrian Safety, Blind and Elderly
- Railroad Grade Crossings
- Road Diets
- Road Rage
- Road Surface Marking and Markers
- Roadside Assistance Programs
- School Bus Safety
- Security, Transportation
- Speed Laws and Enforcement
- Terrorism, Transportation Systems as Targets of
- Tire Safety
- Traffic Calming
- Traffic Incident Management
- Traffic Laws and Enforcement
- Traffic Safety and Risk Assessment
- Transit Safety
- Truck Inspections and Vehicle Licensing
- Trucks, Safety Issues and
- Tunnels, Safety and Security Issues in
- Unmanned Aircraft
- Unsignalized Intersections
- Work Zone Traffic Control
- Social Issues in Transportation
- Accessibility and Mobility
- Automobile Culture
- Automobile Drivers, Disabled
- Automobile Drivers, Elderly
- Civil Rights and Transportation
- Elderly and Disabled Travelers
- Environmental Justice
- Ethical Issues
- Globalization
- Handicapped Access
- Jobs–Housing Balance/Spatial Mismatch
- Neighborhood Disruption From Highway and Transit Construction and Operation
- Rural Transportation Mobility
- Social Equity and Discrimination in Transportation
- Student Transport
- Telecommuting and Telecommunications
- Tourism
- Traffic Congestion
- Transportation and the Disadvantaged
- Urban Sprawl Versus Compact Development
- Welfare Reform
- Women in Transportation
- Women's Issues/Gender Issues
- Surface Transportation Systems
- Automobile Financing
- Automobile Manufacturing and Sales
- Bus Priority Lanes, Exclusive Right of Way
- Bus Rapid Transit, Design and Engineering of
- Bus Systems, Interurban
- Bus Systems, Local and Express
- Bus Systems, Rural
- Commuter Buses
- Commuter Rail
- Consolidated Rail Corporation
- Demand-Responsive Transit, Evaluation Studies of
- Dial-a-Ride
- Funicular Railways
- High Speed Rail, Policy and Planning of
- Hitchhiking
- Jitneys
- National Railroad Passenger Corporation/Amtrak
- Nonmotorized Transportation
- Paratransit in Developing Countries
- Personal Rapid Transit
- Personal Transportation Systems
- Rail Transit Planning, U.S.
- Rail Transit Planning, Worldwide
- Railroads, Freight
- Railroads, Passenger
- School Transportation
- Shared Taxis
- Subway Systems
- Taxicabs
- Tramways
- Transit Systems
- University Transportation Centers
- Technology, Design, and Engineering
- Advanced Traveler Information Systems
- Aeronautical Decision Making
- Aeronautics
- Aircraft Design
- Aircraft Propulsion, New Technologies of
- Aircraft, New Large
- Aircraft, Regional Jet
- Aircraft, Very Light Jet
- Airplane Navigation Systems
- Automated Guideway Transit
- Automated Landing Systems, Airplane
- Automated Passenger Counters
- Automated Road-Pricing and Toll-Collection Systems
- Automated Traffic Control Systems
- Automated Transit Systems
- Automated Vehicle Guidance Systems
- Automated Vehicle Location Systems
- Automated Vehicle Monitoring Systems
- Automatic Terminal Information Systems
- Automobile Design
- Automobile Driver Warning Systems
- Automobile Emissions Controls
- Automobile Engines
- Automobile Tires, Nitrogen Inflation and
- Automobile Travel Patterns
- Bridge Design
- Bus Design
- Bus Design for Accessibility
- Bus Engines
- Bus Information Systems
- Collision Avoidance Systems, Airplane
- Collision Avoidance Systems, Automobile
- Diesel Engines
- Disabled Driving and Vehicle Modifications
- Electric Diesel Locomotive
- Electric Vehicle Recharging Stations
- Electronic Route Guidance Systems
- Emerging Technologies
- Gasoline Engines
- GPS, Automobile
- Harbors, Design and Engineering of
- High Speed Rail, Design and Technology of
- Highway Design and Engineering
- Highway Interchanges
- Highway/Road Capacity
- Hybrid Automobiles/Hybrid Electric Vehicles
- Hydrogen Fuel Cells
- Hypersonic Flight
- Incident Detection Systems, Automobile
- Information Technologies and Transportation
- Inland Waterways, Operations and Management
- Intelligent Transportation Systems
- Intelligent Vehicle Highway Systems
- In-Vehicle Computers
- Low-Emission Vehicles
- Maglev Systems
- Neighborhood Electric Vehicles
- Pneumatic Tube Transportation
- Railroad Automation Technology
- Smart Cars
- Smart Highways
- Street Design/Patterns
- Traffic Detection Systems
- Traffic Engineering
- Traffic Flow
- Transit System Analysis
- Transit System Technology
- Transit Systems Analysis
- Transit Tunnels, Design and Construction of
- Transit Vehicle Capacities, Loading Criteria and
- Transportation Financing
- Congestion Mitigation and Air Quality Program
- Highway Finance
- Highway Trust Fund
- Motor Fuel Taxes
- Parking Cash-Out Systems
- Parking Finance
- Road Pricing Schemes, U.S. and International
- Tax Increment Financing Districts
- Toll Roads, Private
- Transit Fares
- Transit Fares, Elasticity of Demand of
- Transit Finance
- Value Increment Tax
- Vehicle Miles Taxation and Fees
- Transportation Legislation
- Airline Deregulation Act of 1978
- Alternative Motor Fuels Act of 1988
- Americans with Disabilities Act of 1990
- Bureau of Budget Circular A-95
- Clean Air Act and Amendments
- Department of Transportation Act of 1966
- Energy Policy Act of 1992
- Energy Policy and Conservation Act of 1975
- Environmental Quality Improvement Act of 1970
- Executive Order 12898
- Federal Aid Highway Program
- Federal Aid Road Act of 1916
- Federal Aviation Administration Reauthorization Act of 2009
- Federal Highway Act of 1921
- High-Speed Rail Investment Act of 2001
- Intermodal Surface Transportation Efficiency Act
- Motor Carrier Act (MCA) of 1980
- Moving Ahead for Progress in the 21st Century Act
- National Energy Act of 1978
- National Environmental Policy Act
- National Highway System Design Act of 1995
- National Mass Transportation Assistance Legislation
- Safe, Accountable, Flexible, Efficient Transportation Equity Act: A Legacy for Users
- Section 504 Regulations on Accessibility
- Surface Transportation Assistance Act of 1978 and 1982
- Transportation Equity Act for the Twenty-First Century
- Urban Mass Transit Act of 1964
- Transportation Modeling
- Activity-Based Models
- Destination Choice Models
- Equilibrium Modeling
- Freight Transport Models
- Full-Feedback Modeling
- Gravity Models
- Integrated Transportation and Urban Land Use Planning Models
- Microsimulation Models
- Mode Choice Models
- Network Modeling
- Origin–Destination Models
- Residential Location Models
- Route Assignment Models
- Supernetworks
- Traffic Forecasts
- Traffic Simulation
- Traffic Variables
- Transit Systems Analysis
- Transportation Modeling and Planning Software
- Travel Demand Forecasting
- Travel Model Calibration and Validation
- Travel Model Improvement Program
- Travel Modeling
- Travel Speed Models
- Trip Distribution Models
- Trip Generation Rates and Models
- Urban Transportation Modeling System
- Vehicle Ownership Models
- Transportation Modes
- Aerial Tramways
- Automobiles, Passenger
- Bicycles
- Bicycles, Electric
- Buses
- Commuter Rail
- Electric Vehicles
- Ferries
- Heavy Rail Transit
- Helicopters
- Light Electric Vehicles
- Light Rail Transit
- Light-Duty and Pickup Trucks
- Monorails
- Motorcycles
- Recreational Vehicles
- School Buses
- Ships
- Sport Utility Vehicles
- Streetcars/Trolleys
- Subways/Elevated Trains
- Taxicabs
- Trains
- Trolleybuses
- Trucks
- Vans
- Walking
- Transportation Organizations and Agencies
- American Association of State Highway and Transportation Officials
- American Public Transportation Association
- Bureau of Public Roads
- Environmental Protection Agency
- Federal Aviation Administration
- Federal Highway Administration
- Federal Motor Carrier Safety Administration
- Federal Railroad Administration
- Federal Transit Administration
- Institute of Traffic Engineers
- Interstate Commerce Commission
- Maritime Administration
- National Highway Traffic Safety Administration
- National Transportation Safety Board
- Pipeline and Hazardous Materials Safety Administration
- Surface Transportation Board
- Surface Transportation Policy Project
- Transportation Cooperative Research Program
- Transportation Research Board
- U.S. Department of Transportation
- Travel Behavior and Research
- Air Travel
- Automobile Trips
- Bicycle Commuting
- Business Travel
- Car Sharing
- Carpooling
- Carpooling, Casual
- Chicago Area Transportation Study
- Commuter Paradox
- Commuting
- Cordon Travel
- Derived Demand
- Driver Licensing Rates
- Employment Location
- E-Shopping
- Induced Travel
- Latent Travel Demand
- Mode Choice Models
- Multiple Criteria Decision Making/Aiding
- National Household Travel Survey
- Noncommuter Travel
- Ocean Cruise Industry
- Parking Demand
- Pedestrian Travel
- Privately Owned Vehicles
- Queuing and Shockwaves Measurement
- Recreational Travel
- Reverse Commuting
- Single-Occupant Vehicle Trips
- Traffic Psychology
- Transit Demographics
- Transit Dependence
- Transit Ridership
- Transportation Studies
- Transportation Surveys
- Travel by Households
- Travel by Mode
- Travel by Persons
- Travel Choice
- Travel Demand
- Travel Destinations
- Travel Diaries
- Travel Patterns by Income
- Travel Patterns by Race/Ethnicity
- Travel Patterns of the Elderly
- Travel Patterns of Women
- Trip Chaining
- Triple Convergence
- Vehicle Miles Traveled
- Water Transportation Systems
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