Transportation Planning An Introduction CE 331 Transportation Engineering

Transportation Planning: An Introduction CE 331 Transportation Engineering

Background ¢ Issues l ¢ Congestion, safety and security, … Congestion alleviation measures Increase supply l Reduce demand l Need a comprehensive plan

Characteristics of Transportation Systems ¢ ¢ Multi-modal Air, land, marine, pipeline Passenger, freight Multi-sectoral Government, private industry, public Multi-problem Policy, planning, operational, economic development, environmental, social equity, urban development Multi-disciplinary Engineering, economics, operations research, political science

Basic Questions ¢ Where are we now? l ¢ Where do we want to go? l ¢ Major issues, public opinion, opportunities and obstacles What will guide us? l ¢ Existing condition of urban systems Mission statement, goals & objectives, performance measures How will we get there? l Project implementation, policy changes

Definition ¢ Transportation planning is the process of Establishing a vision l Understanding the types of decisions l Assessing opportunities and limitations l Identifying near & long term consequences l Relating alternative decisions l Presenting information l

Travel Demand Forecasting ¢ To answer the following questions: “Whether” to make a trip? l “Where” to make the trip? l “When” to make the trip? l “Which mode” to use? l “Which route” to take? l

Decision-Making Process

Four-Step Process Trip generation ¢ Trip distribution ¢ Modal split ¢ Traffic assignment ¢

Land Use and Socioeconomic Projections Trip Generation Trip Distribution Modal Split Traffic Assignment Direct User Impacts Transportation System Specifications

Traffic Analysis Zone (TAZ) Special-purpose geographic entity ¢ Delineated by state and local transportation officials for tabulating traffic related data from the census such as ¢ Journey to work l Place to work l

4 Step Outcomes