To　analyze　interchange　guide　signs＇　influence　on　vehicle　speed　in　three　kinds　of　interchange　ramps　of　an　urban　expressway,　vehicle　operating　data　through　a　driving　simulator　experiment　which　was　composed　of　twelve　scenarios　on　basis　of　guide　signs　and　different　kinds　of　interchange　ramps　as　two　sorts　of　experiment　controlling　factors　were　obtained.　The　affected　situation　of　speed　kind　indicators,　“speed,　standard　deviation　of　speed,　accelerator　and　standard　deviation　of　accelerator”,　were　analyzed　through　pair　T　test.　The　result　of　subjective　questionnaires　showed　that　47.83%　experimenters　thought　“interchange　pattern　guide　sign”　was　the　most　effective　among　the　system　of　interchange　guide　signs,　and　61.9%　experimenters　selected　the　running　speed　as　the　primary　impacted　factor,　which　was　mostly　reduced.　Meanwhile,　results　of　vehicle　operating　data　indicated　that　under　the　effect　of　different　levels　of　complex　alignments　of　ramps,　“interchange　pattern　guide　sign”　cooperated　with　three　advanced　guide　signs　had　different　influences　on　the　speed　kind　indicators　in　three　kinds　of　interchange　ramps.　In　directional　ramp,　the　speed　indicators　were　not　affected.　But,　in　semi-direction　ramp　and　loop　ramp,　the　speed　during　affected　range　of　“interchange　pattern　guide　sign”　was　reduced　significantly　and　the　critical　effected　segments　were　mainly　gathered　in　the　vicinity　of　corresponding　ramp　exit.　Nevertheless,　speed　indicators　and　critical　affected　segments　influenced　by　“interchange　pattern　guide　sign”　were　different　in　semi-direction　ramp　and　loop　ramp　as　a　whole.　What＇s　more,　the　interaction　effect　between　effects　of　“interchange　pattern　guide　sign”　and　“three　advanced　guide　signs”　existed　and　was　different　in　semi-direction　ramp　and　loop　ramp.　©,　2015,　Beijing　University　of　Technology.　All　right　reserved.