Police are pleading with motorists to stick to the one-way system over the TT fortnight.
Work is being carried out today to turn the Mountain Road one-way between Barrule Park in Ramsey and the Creg-ny-Baa - it'll close from 9.30am until 4.30pm.
It's something that happens every year - and something that still catches out both visitors and locals:
Detective Inspector Mark Newey says the problem is exacerbated by SAT NAV systems telling people they can drive onto the course.
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