To　develop　a　practicable　and　clear　guideline　for　implementing　Chevrons　on　China＇s　highways,　it　is　necessary　to　understand　the　effect　of　Chevrons　on　driving　performance　in　different　roadway　geometries.　Using　a　driving　simulator,　this　study　tests　the　effect　of　China＇s　Chevrons　on　vehicle　speed　and　lane　position　on　two-lane　rural　highway　horizontal　curves　with　different　roadway　geometries.　The　results　showed　a　significant　effect　of　Chevrons　on　speed　reduction,　and　this　function　was　not　significantly　affected　by　curve　radius　but　was　statistically　affected　by　curve　direction.　The　speed　reduction　caused　by　Chevrons　was　also　significant　at　the　approach　of　curve,　middle　of　curve　and　point　of　tangent.　The　85th　percentile　speed　was　also　markedly　lower　when　Chevrons　were　present.　We　also　found　a　significant　effect　of　Chevrons　in　encouraging　participants　to　drive　the　vehicle　with　a　more　proper　lane　position　at　the　first　half　of　curves;　and　this　function　was　slightly　affected　by　curve　radius.　Meanwhile,　the　effect　of　Chevrons　on　keeping　drivers　staying　in　a　more　stable　lane　position　was　also　statistically　significant　at　the　second　half　of　curves.　In　sharp　curves,　the　function　of　Chevrons　to　make　drivers　keep　a　stable　lane　position　was　lost.　Besides,　the　impact　of　curve　direction　on　the　function　of　Chevrons　on　lane　position　was　always　present,　and　drivers　would　drive　slightly　away　from　Chevrons.　Regardless　of　the　curve　radius,　China＇s　Chevrons　at　horizontal　curves　provide　an　advance　warning,　speed　control　and　lane　position　guide　for　traffic　on　the　nearside　of　Chevrons.　Besides,　combing　with　the　function　of　Chevrons　on　preventing　excessive　speed　and　the　benefit　to　make　drivers　keep　a　more　proper　lane　position,　China＇s　Chevrons　appear　to　be　of　great　benefit　to　reduce　crashes　(e.g.,　run-off-road)　in　curves.　(C)　2014　Elsevier　Ltd.　All　rights　reserved.