Ramp　is　an　important　part　of　interchange,　the　ramp　design　idea　based　on　the　running　speed　is　a　new　design　idea　of　the　highway　and　interchange.　This　paper　is　mainly　focused　on　the　interchange　ramp　running　speed　of　the　vehicle.　Through　the　analysis　of　the　influence　factors　of　the　interchange　ramp　running　speed,　the　orthogonal　experiment　program　is　formulated,　and　then　continuous　running　speed　data　of　the　vehicle　on　the　four　interchanges　in　Beijing　is　collected,　in　total　of　14　ramps　with　the　vehicle-mounted　high　precision　GPS　devices.　According　to　10　of　these　ramps＇　data,　based　on　the　running　speed　characteristics　of　the　vehicle　on　the　interchange　ramp,　the　ramp　is　divided　into　three　sections:　deceleration　section,　uniform　section,　acceleration　section.　At　last,　the　prediction　model　of　each　section　between　the　interchange　ramp　running　speed　and　the　influence　factors　is　established,　and　then　the　prediction　model　is　verified　through　comparing　the　remaining　four　ramps＇　measured　data.　The　results　show　that　the　relative　error　values　of　the　prediction　model　are　less　than　5%,　the　accuracy　of　the　model　is　validated.　Copyright　©　2015　by　Science　Press.