Drivers who use Mill Road bridge will receive a warning but not be fined - for now.
The Mill Road bridge bus gate in Cambridge bans all vehicles from crossing except buses, taxis, emergency services and blue badge holders.
Work to install the gate was completed in November 2024, despite disruption from protestors.
Cambridgeshire County Council said any driver who breaks the rules from 9 Dec 2024 will receive a warning, and fines will be rolled out from March.