Overdimension vehicles are large, slow, and often escorted. Expect plenty of warning, follow any pilot's directions, and only pass when it's genuinely safe.
Around overdimension vehicles
An overdimension (oversize) vehicle is large and slow, so expect advance warning from pilot vehicles, along with hazard panels, beacons and flags on the vehicle itself. If a pilot vehicle gives you directions, slow down and do what it tells you — and be patient. Only pass when it's safe and legal, since wide or long loads make passing more difficult.