Pay attention to the truck drivers where construction is going on. Sometimes the "lane switches" involve a swerve just before an overpass. You want to allow yourself plenty of clearance from the lane that runs close to the overpass support posts. The drivers usually know ahead of time and will move into the lane with the most clearance.
They also will use the lane that gives them the most room when you run into the concrete barriers that line some construction areas. Just don't follow the truckers too closely as you will want some room for when they throw that "alligator" at you.
Also, don't flash your brights at drivers to let them know they have clearance to move over after passing you. They know when they are clear and the light can temporarily blind them at night. If you must signal a driver, do so by turning your lights off and then back on.