The　rate　of　incidents　involving　commercial　vehicles　is　a　particular　concern　in　China,　accounting　for　an　estimated　35.8%　of　all　crashes　in　2004　and　over　30%　in　20051.　Commercial　motor　vehicle　safety　issues　in　China　were　studied　by　collecting　data　from　the　Jingjintang　freeway,　which　serves　as　the　primary　high-speed　link　between　the　cities　of　Beijing　and　Tianjin,　China.　For　this　study,　heavy　vehicles　refer　to　vehicles　with　a　gross　weight　of　at　least　20,000　pounds　or　vehicles　designed　to　transport　at　least　40　passengers.　This　vehicle　type　is　a　surrogate　for　most　Commercial　Vehicles.　Mid-sized　vehicles　are　those　with　a　gross　weight　between　10,000　to　20,000　pounds,　or　vehicles　designed　to　transport　20　to　39　passengers.　Light/compact-sized　vehicles　are　those　smaller　than　the　mid-size.　Commercial　vehicles　are　over-represented　in　collision　involvement,　and　crashes　that　involve　commercial　vehicles　have　a　higher　severity　level.　Data　collected　from　a　survey　of　commercial　vehicle　drivers　was　analyzed　for　statistical　relationships　between　collision　probability　and　causes　related　to　driver　behavior,　driver　training,　and　vehicle　mechanical　condition.　Higher　crash　risk　corresponds　to　lower　driver　experience,　increased　driver　tendency　to　load　a　vehicle　in　excess　of　design　capacity,　operation　of　older　or　defective　vehicles,　and　driver　tendency　to　travel　at　excessive　speeds.　Based　on　the　known　factors　influencing　commercial　vehicle　crash　probabilities,　a　number　of　potential　safety　countermeasures　are　suggested　for　further　study　in　China.　Copyright　ASCE　2008.