Abstract: As the uncertain features of the freeway traffic flow，fuzzy control can be used as an acceptable way to solve traffic problem.As an extension of the ALINEA，a new adaptive local ramp metering controller is proposed.The developed AD-Fuzzy Controller may be valuable whenever the critical occupancy cannot be estimated beforehand or is subject to real-time change due to changing environmental conditions or traffic composition.Simulation results have been compared to the ALINEA method according to performance index.