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# Transit assignment

Transit assignment models are mathematical tools that predict how passengers behave and travel in a transit network, given some assumptions and inputs.

Transit assignment models aim to answer questions such as:

- How do transit passengers choose their routes in a complex network of lines and services?

- How can we estimate the distribution of passenger flows and the performance of transit systems?

In the following sections, we’ll present the `TransitGraph`, the graph structure used for a transit network, and the hyperpath routing for transit assignment.

Transit assignment

- The Transit assignment graph
- Hyperpath routing in the context of transit assignment