In　China,　chevron　alignment　signs　are　widely　used　as　guide　signs　to　guide　driving　direction　in　curve　roads,　but　the　impact　of　guide　chevron　alignment　sign　on　driver　performance　was　not　explicit.　The　results　of　a　driving　simulator　study　that　focused　on　the　influence　of　guide　chevron　alignment　signs　on　driver　performance　was　described.　The　data　of　driver　performance　were　respectively　collected　in　a　simulated　ramp　with　or　without　guide　chevron　alignment　signs.　The　analysis　indexes　mainly　included　speed,　lateral　placement,　the　angle　of　steering,　times　of　brake　and　accelerator.　The　results　indicated　that　the　distance　of　vehicles　deviating　right　from　the　center　of　the　lane　would　be　larger,　and　driver＇s　will　to　control　speed　was　higher　in　the　scenario　with　guide　chevron　alignment　signs,　which　demonstrated　that　guide　chevron　alignment　signs　did　affect　driver　performance,　and　the　influence　was　positive　to　driving　safety.　©　right.