Submersible bridge Corinth Canal

Didnt know such things existed , its like something out of Thunderbirds
This is a submersible bridge at the Eastern end of the Corinth Canal (there is another one at the Western end).
Filmed at Isthmia on two separate days in October 2023
The bridge goes down to give 8 metres clearance for shipping. There used to be two carriage ways but only one seems to be now in use