It's difficult to avoid road construction when there is only one road! And with a limited 3 month window for repairs you will drive through construction zones.
There were no significant road construction delays in 2013. The Cassiar was closed for days due to a flood. The Parks Highway out of Fairbanks was closed several days for a fire. Kick back, relax and wait it out.
Road construction: Rip up 15 miles at a time - both lanes so all dirt, mud, gravel and very rough. Replace all culverts so route traffic through creek beds. You may/may not have a pilot.
There was a lot more complaining about rain than construction on these boards. But we had 24/7/3 months of sun with 3 nights of rain.
Advice: When you arrive in Tok if Valdez/Kenai have good weather go there otherwise go to Fairbanks.
It's all part of the adventure.