White Cart Viaduct work may cause one-hour M8 delays
Drivers are being warned that essential maintenance work on the M8 White Cart Viaduct near Glasgow Airport could delay journey times by up to one hour.
The third stage of a four phase £30m works programme will get under way on Boxing Day and run until spring 2012.
During that time lane and ramp closures will be in place and average speed cameras will enforce a 40 mph limit.
Travellers are advised to make extra time for journeys. The viaduct carries more than 90,000 vehicles a day.
The structure carries the M8 over the White Cart Water immediately to the south of Glasgow Airport, and is a principal route to the airport.
A Transport Scotland spokesman said: "It is crucial that we upgrade the structure to ensure the safety of those using the road.
"We have specifically chosen to start the daytime element of these works on 26th December because our data shows that this is when there is the least number of Heavy Goods Vehicles on this route and it is important that we do not have large numbers of these vehicles crossing while the works are carried out.
"Thereafter, there is a window of opportunity to complete the works which minimises the impact on other stakeholders such as airport travellers."
The spokesman said the work would "inevitably increase journey times" and urged motorists "particularly those heading to the airport, to plan ahead and to allow additional time for their journeys".
The third phase of the viaduct revamp, which is costing £11.8m, got under way in July 2010.
To date, all work has been inside and below the viaduct with some overnight lane closures on the motorway since 28 November.
The next stage will see work start on the carriageway to bring the viaduct, which was built in 1968, up to modern safety standards.
The fourth and final part of the revamp is expected to be finished in 2016.