This document summarizes a court case, R. v. Slawter, in which the appellant Jerry Slawter appealed his careless driving conviction. The presiding judge allowed the appeal and quashed the conviction. While the appellant drove aggressively by moving between lanes, the judge determined the lane change that led to the charge could have been due to momentary inattention while driving a large truck in rainy conditions with difficult to see lane markings. As such, the judge found the appellant's actions did not amount to careless driving and that due diligence had been established.