The　traffic　volumes　of　trucks　on　freeways　and　parallel　national　and　provincial　roads　significantly　vary;　moreover,　the　utilization　rate　of　freeways　is　markedly　low　at　times.　Implementing　effective　traffic　volume　guidance　to　change　the　travel　route　choice　intentions　of　truckers　is　a　critical　approach　to　improving　the　utilization　rate　of　freeways.　Travel　route　choice　intentions　are　influenced　by　numerous　factors,　such　as　personal　and　travel　characteristics.　In　this　study,　based　on　structural　equation　modeling　(SEM),　186　truckers　on　freeways　and　522　truckers　on　parallel　national　and　provincial　roads　were　collected　using　structural　equation　modeling　(SEM)　based　on　a　questionnaire　survey　in　Guangxi,　China.　Relationship　models　of　the　influencing　factors　of　travel　route　choice　intentions　for　truckers　on　freeways　and　on　their　parallel　roads　are　constructed　separately　by　SEM　to　explore　the　direct　and　indirect　effects　of　the　personal　characteristics,　travel　characteristics,　economic　factors,　and　travel　choice　habits　of　truckers　on　travel　route　choice　intentions.　The　model　results　for　truckers　on　freeways　indicate　that　only　travel　characteristics　significantly　affected　travel　route　choice　intentions,　and　this　effect　was　negative.　For　truckers　on　parallel　national　and　provincial　roads,　travel　characteristics　exerted　the　most　significant　positive　effect　on　travel　route　choice　intention;　by　contrast,　travel　route　choice　intention　was　most　negatively　affected　by　economic　factors.　The　results　for　the　two　models　reveal　that　personal　characteristics,　and　travel　choice　habits　exert　no　significant　effects　on　the　travel　route　choice　intentions　of　truckers　on　freeways　and　parallel　roads.　In　addition,　the　results　of　the　mediation　analysis　demonstrate　that　personal　characteristics　have　a　significant　indirect　effect　on　travel　choice　habits　mediated　by　travel　characteristics.　Based　on　the　study　findings,　several　recommendations　can　be　suggested　as　guidelines　to　facilitate　the　shifting　of　the　traffic　volume　of　trucks.