This　paper　researched　the　impact　of　left　shoulder　width　on　driving　behavior.　In　this　study,　virtual　driving　scenarios　of　different　left　shoulder　widths　were　calibrated　using　virtual　driving　simulation　technology,　and　driving　process　data　(speed,　acceleration,　vehicle　location,　and　lateral　displacement)　were　collected　using　the　supporting　data　acquisition　system.　First,　the　influence　of　the　left　shoulder　on　driving　indicators　was　analyzed.　Then　the　indicators　which　were　sensitive　to　the　changes　of　left　shoulder　width　were　selected　for　evaluating　the　trends.　According　to　the　analysis　of　the　collected　data,　the　standard　deviation　of　speed　and　lateral　displacement　were　determined　to　analyze　the　characteristics　of　the　left　shoulder　width　impact　on　driving　behavior.　©　2012　American　Society　of　Civil　Engineering.