This work research objects are the following: vehicles speed measurement system «Iskra-1», radar-detector Escort Passport 9500ix, vehicles speed measurement systems radio-electronic repression secretive device. This work purpose is the following: vehicles speed measurement systems radio-electronic repression secretive device working principals formation and radio-electronic protection methods description. In this work previously published works [1,2,3] connected with vehicles speed measurement system «Iskra-1» - its technical characteristics, working principal and construction - and radar-detector Escort Passport 9500ix - its possibilities and working modes - are taken into consideration. This work comes as unique one of its kind because of vehicles speed measurement systems radio-electronic repression secretive device doesn’t review in other works previously. As a result of this work vehicles speed measurement systems radio-electronic repression secretive device working principals are formed and radio-electronic protection methods are described.