BUS trips from Newquay to Truro and vice versa will be diverted during the period when the St Agnes lights switch-on takes place.
The festive event will be held between 4.30pm and 6pm on Sunday, December 1 and affects the U1A bus service.
Buses will be diverting as follows:
From Truro: From Sevenmilestone garage, buses will right divert via Goonbell to reach the coast road close to the Wheal Kitty turn. They will then turn right for Perranporth and resume their normal line of route.
From Newquay: Buses will turn left just prior to wheal Kitty turn and follow through Goonbell to Sevenmilestone garage, where they will resume their normal line of route.
A spokesperson for Cornwall First Bus said: “We apologise for any inconvenience this may cause.”