It is demonstrated that Alfve´n waves may be the convenient trigger for the formation of transport barriers in tokamaks. Kinetic or slow Alfve´n waves, which appear in the tokamak plasma as a result of the rf wave’s conversion, have small radial localizations. It is proposed that these waves can be used to create strongly sheared plasma flows at any point of the plasma minor radius, to suppress the plasma turbulence and to obtain the locally reversed magnetic shear configuration. Estimations concerning the absorbed power of Alfve´n waves, which are necessary to suppress the plasma turbulence in some tokamaks, are about the level of absorbed power to be used in early fulfilled experiments. This method can assist the achievement of self-organization processes in tokamaks. ©1998 American Institute of Physics.