FIELD: road building; devices and systems for checking condition of pavements. SUBSTANCE: device has automobile steerable wheel revolution counter and calculator to input of which revolution counter is connected. Device is furnished additionally with change-over switch, automobile driven wheel revolution counter and indicator. Change-over switch and driven wheel revolution counter are connected, respectively, to second and third inputs of calculator, and output of calculator is connected with input of indicator. EFFECT: improved safety of steering. 2 dwg
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