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Aggregated Transaction {#um-intro-models-aggr}
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The final transit fare is not always known at the time of travel. It is calculated at the end of a travel period, typically 24 hours, based on the journeys made during that period and any applicable fare limits. An *aggregated transaction* is used on contactless terminals at transit access points to support fare calculation after the travel period has ended.

#### Figure: {#um-intro-models-aggr_fig_q2r_wmd_j3c}

Aggregated Fare Transaction Workflow  
![Diagram showing aggregated fare transaction workflow](/content/dam/documentation/cybs/en-us/topics/payments-processing/card-processing/mass-transit/images/aggregated-transaction-flow-480x520.svg/jcr:content/renditions/original)  
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