Police say drink driving won't be tolerated.
The constabulary took to social media this week to say they arrested a local resident caught driving over the limit earlier this week.
The force will be at the Sea Terminal with breathalysers throughout TT to check those arriving on Island are fit to drive.
Officers say they'll go out of their way to seek out and arrest those who break the law.
Two Manxman crossings called off
New warning for coastal overtopping at high tide
Government wants to re-roof governor's home
EVF to roll out body cameras to all Island stores
Good news for Island's Vinted sellers!
Ferry sailings under threat this week
Mountain Road gritting gets underway
Civic Amenity Site issues statement after former manager admits fraud