A coach is in lane 1 of a three-lane motorway and needs to pass a slow vehicle while a red X appears over lane 2 ahead. What is the safest interpretation?

1. The red X lane is closed, so plan early to stay out of it and manage speed behind the slow vehicle if necessary
2. Use lane 2 briefly because the coach is only overtaking
3. Move to lane 3 immediately without mirror checks
4. Treat the red X as advisory unless cones are visible