Adjustable roof extension for reducing vehicle wind resistance

摘要

An adjustable roof extension for a vehicle that has a cab portion and a trailer portion includes a roof extension adapted for disposition at a rear of a roof of the cab portion and an adjustment mechanism that attaches the roof extension to the cab portion such that the roof extension is pivotable and that an end of the roof extension that is nearer the trailer portion is controllably movable to pull an air flow over the cab portion toward the trailer portion.