The gate opens on a zero-value record.
TfL designed the reader to stay simple. After the traffic day closes, the back office groups each card's touches into journeys, adds the fares, applies the best daily or weekly cap where appropriate and requests one charge from the card account.
That timing explains two familiar oddities: a bank statement shows one TfL total, and today's online journey cost can remain an estimate until the following day.
TfL's traffic day runs from 04:30 to 04:29.

A skydive will help young people living with cancer find support together.
Nicola is jumping for Flynne's birthday on 13 September. The money supports Flynne's Barn in Borrowdale, where young people aged 13 to 25 can meet others who understand, join residential stays and use specialist counselling.
