The Charter of the French language and its regulations govern the consultation of English-language content.

Tutorials

Learn more about how to use several Chrono features.

All

10 April 2024

This feature lets you consult the contents of your OPUS or occasional smart card, and purchase new fares for your OPUS. See how to use [...]

16 October 2023

This feature allows you to view the contents of your OPUS card or non-refillable smart card. See how to use this feature.