Solving　the　problems　of　intersections　is　the　crux　of　urban　traffic.　Installing　traffic　control　signal　reasonably　can　improve　traffic　capacity,　reducing　traffic　conflicts.　Manual　on　Uniform　Traffic　Control　Devices　stipulates　the　warrants　of　various　signal,　which　are　widely　cited　by　other　countries.　Our　country　basically　adopt　American　standard.　However,　the　difference　of　traffic　condition　between　China　and　America　causes　this　warrant　is　limited　greatly　in　concrete　application,　hence,　this　paper　proceeds　further　study　on　traffic　signal　warrant　according　to　our　national　condition.　Aiming　at　unsignalized　intersections　with　equal　right-of-way　which　is　widely　used　in　China,　the　paper　discusses　a　new　traffic　signal　warrant　for　unsignalized　intersections　with　equal　right-of-way　by　analyzing　the　relationship　of　vehicle　volume　and　delay.　The　new　traffic　signal　warrant　proposed　by　the　paper　enriches　the　traffic　planning　theory,　not　only　the　theoretical　significance,　but　also　the　practical　value　in　engineering.　©　2012　American　Society　of　Civil　Engineering.