Trip Distribution in Transportation Planning
Trip distribution models allocate trips between origin and destination zones in a region, essential for forecasting travel patterns and traffic loads.
Summary
Trip distribution models allocate trips between origin and destination zones in a region, essential for forecasting travel patterns and traffic loads. It is a key component in the four-step transportation planning process, following trip generation and preceding mode choice and route assignment. The most widely used method is the gravity model, which predicts trips proportional to the product of productions and attractions and inversely proportional to travel cost. This cost may include distance, time, or combined monetary and time penalties. Balancing factors adjust the model to ensure total trips produced equal trips attracted in each zone. Alternative models include the intervening opportunities and growth factor models, but the gravity model prevails due to its intuitive basis and flexibility. Accurate trip distribution forecasting supports infrastructure planning, congestion management, environmental assessments, and policy impact analysis, making it critical for effective transportation planning.
🧠 Key Concepts
- Trip Distribution
- Gravity Model
- Trip Generation
- Travel Cost
- Balancing Factor
- Four-Step Model
- Intervening Opportunities
- Growth Factor Model
- Mode Choice
🧠 Quick Check
See what you remember from the summary.
What does the gravity model in trip distribution primarily depend on?
🧠 Flashcards Preview
Tap a card to reveal the definition.
Ready to quiz yourself?
Test what you remember with a full practice quiz on this note. Create a free account and start in seconds.
Full Notes
Read the original note content before deciding whether to save or study from it.
Trip Distribution in Transportation Planning
📘 Overview Trip distribution models determine how trips generated in different zones of a region are allocated to various destinations. This process is essential in understanding travel patterns and forecasting traffic loads on transportation networks.
🧠 Key Idea Trip distribution is the step in transportation planning that predicts the number of trips between each origin and destination zone based on factors like trip attraction, generation, and travel cost or impedance.
⚔️ Core Details: - Trip distribution follows trip generation and precedes mode choice and route assignment in the four-step transportation planning model. - The gravity model is the most common trip distribution method, inspired by Newton's law of gravitation, where trips between zones are proportional to the product of trip productions and attractions and inversely proportional to a function f - The gravity model formula:
More ways to study when you copy this note
Copy this note into your library to unlock focused practice sessions and long-term review.
Answer all questions first, then see feedback at the end — the way real exams work.
Focuses each session on what you got wrong, not what you already know.
Full timed exam with all questions, no pausing, and results at the end. Built for board exam prep.
More in Transportation Planning
See all →More from NoteLib
Browse NoteLib's public notes →Copy this note to your library and get the full Study Pack instantly — summary, key concepts, and practice quiz included.