8. Trip Distribution
Trip distribution involves the process of allocating generated trips to various destinations based on the choice of travel purpose. This chapter discusses essential methods for trip distribution, including the growth factor model and gravity model, highlighting their calibration and application in transportation planning.
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8.4Gravity Model
The gravity model is a method for distributing trips between origins and...
What we have learnt
- Trip generation is the process of determining travel needs within zones.
- Trip distribution is the second stage of travel demand modeling, allocating trips to various destinations.
- Two key methods for trip distribution are the growth factor model and the gravity model, each with its own advantages and limitations.
Key Concepts
- -- Trip Matrix
- A representation of the trip pattern in a study area using a matrix where rows and columns represent zones, with values indicating trips between origins and destinations.
- -- Generalized Cost
- A cost measure incorporating multiple factors like travel time, fare, and convenience, affecting trip distribution between two zones.
- -- Growth Factor Model
- A method that utilizes growth rates from observed trip data to project future trip distributions based on short-term trends.
- -- Gravity Model
- A model based on the analogy of gravitational force, predicting trip distribution by considering the size of areas and the distance between them.
- -- Doubly Constrained Model
- A model taking into account both trip productions and attractions, ensuring balanced outputs for trip distribution across various zones.
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