To　study　the　characteristics　of　lateral　acceleration　on　the　curve　of　small　radius　and　the　relationship　between　the　lateral　acceleration　and　lateral　offset,　simulation　experiment　of　vehicle　driving　on　curve　section　with　small　radius　was　carried　out　by　driving　simulator,　and　the　lateral　acceleration　and　lateral　offset　of　the　vehicle　were　obtained.　Due　to　the　small　radius　of　the　two-lane　highway　curved　section　by　the　lateral　force,　the　characteristics　of　transverse　acceleration　on　the　curve　segment　were　analyzed,　and　a　mathematic　model　of　vehicle　lateral　acceleration　prediction　and　the　correlation　between　lateral　acceleration　and　lateral　offset　was　established　by　using　Matlab　software.　Results　show　that　the　lateral　acceleration　increases　with　the　increase　of　the　velocity,　the　lateral　acceleration　and　lateral　offset　reach　the　maximum　in　the　point　of　curve　to　spiral,　and　the　lateral　acceleration　of　circular　curve　segment　has　a　logarithmic　positive　correlation　with　lateral　offset.　The　results　provide　theoretical　support　for　the　safety　analysis　and　accident　prevention　of　two-lane　road　with　small　radius　curve.　©　2019,　Editorial　Department　of　Journal　of　Beijing　University　of　Technology.　All　right　reserved.