PLUS Expressways Berhad has published a travel time advisory (TTA) for people who will be using highways during peak travel time from December 24th 2014 to January 4th 2014.
Here is the advisory for northbound travel:

And here is the advisory for southbound travel:

This is a good initiative by PLUS and throughout the years we have found this to be a good method of combating congestion during peak travel time. Road users are strongly recommended to follow this advisory to ensure smoothness in your journey.