Speeding　is　a　kind　of　common　illegal　behavior　among　drivers,　and　is　also　one　of　the　primary　reasons　causing　traffic　accidents　and　so　the　speed　management　takes　on　great　importance.　As　the　effect　of　traditional　speed　control　measures　is　not　significant,　the　speed　camera　is　introduced　as　a　new-style　speed　control　device　with　the　development　of　high-tech.　Many　overseas　reports　show　that　the　effect　of　speed　camera　is　excellent,　especially　on　the　expressway.　However,　there　are　only　a　few　studies　on　the　effect　of　speed　camera　in　China.　It　bears　highly　theoretical　and　practical　sense　to　analyze　systematically　the　effects　on　reducing　speed　of　the　speed　camera.　This　paper　takes　an　urban　expressway　in　Beijing　as　studying　object,　and　explores　the　effects　on　speed　control　of　speed-limit　sign,　rumble　strip　and　speed　camera.　The　result　shows　the　favorable　effect　of　speed　camera　on　speed　control.　©　2010　ASCE.