Volvo Trucks in 2011 recorded the North American heavy-duty truck industry’s largest market share gain of the year, based on retail sales data compiled by WardsAuto Group.

Volvo also hit a company record market share of 12.1 percent of the combined United States and Canadian retail market, and reached record penetration levels for its engines and I-Shift automated manual transmission.

Volvo Trucks’ retail market share in the U.S. jumped nearly three points and retail sales nearly doubled over 2010.