The　motion　inertia　load　of　truck　in　curved　road　sections　has　significant　oscillation　and　impact　characteristics.　Based　on　the　dynamic　simulation　method　by　TruckSim　and　the　field　test　of　truck　load,　five　types　of　standard　curved　road　sections　and　load　characteristic　parameters　were　defined.　The　influence　of　the　combination　of　curve　type,　radius,　vehicle　speed,　and　driving　behavior　on　the　motion　inertia　load　is　mainly　studied.　The　research　shows　that　the　inertial　load　of　truck　in　curved　road　sections　has　complex　characteristics　such　as　bifurcation,　multiple　motion　modes,　and　oscillation　effects,　and　basic　characteristics　such　as　eccentric　loading,　multi-directional　combination　of　loading,　and　impact.　Bifurcation　is　the　most　important　load　characteristic　in　curved　road　sections,　which　has　complex　coupling　relationship　with　vehicle　speed,　curve　radius　and　superelevation,　and　has　critical　speed　effect.　There　are　many　kinds　of　motion　modes　such　as　lateral　motion,　roll　motion,　and　yaw　motion　in　curved　road　sections,　and　the　inertial　impact　load　is　induced　by　the　suspension　spring.　There　are　longitudinal　acceleration　and　deceleration,　braking　motion,　and　multiple　sway　motion　for　the　S-type,　isotropic　type,　reverse　type,　and　generalized　type,　and　the　load　has　oscillation　effect　after　the　curve　is　out.　Bifurcation　behavior,　eccentric　load,　and　excessive　inertia　impact　were　the　main　causes　of　premature　and　complex　failure　mode.　The　calculation　method　of　load　bifurcation,　the　value　range　of　eccentric　load,　vertical　and　horizontal　lateral　impact　coefficient　were　proposed　to　provide　supports　for　pavement　design　and　management.　©　2024　Tsinghua　University.　All　rights　reserved.