This　paper　formulates　the　ramp　metering　control　problem　as　a　real-time　feedback　control　problem.　The　nonlinear　dynamical　traffic　flow　density　model　for　the　ramp　metering　is　developed.　A　novel　control　scheme　based　on　Auto-Disturbances-Rejection　Controller　(ADRC)　is　applied　to　ramp　metering,　which　is　independent　of　the　plant　parameter.　Simulations　are　performed　for　the　local　ramp　metering　using　the　new　nonlinear　feedback　control　law　that　shows　encouraging　results.　The　results　indicate　that　this　algorithm　is　effective　for　the　limited　plant　parameter　range.　It　can　maintain　the　traffic　flow　density　of　mainline　in　a　desired　value.　The　performance　of　our　algorithm　is　better　than　ALINEAR　algorithm.　©　2005　IEEE.