The north american standard out of service criteria is the pass fail criteria for roadside safety inspections the purpose of the criteria is to identify critical safety violations those violations render the driver vehicle and or motor carrier out of service until the conditions or violations can be corrected or repaired. The north american standard out of service criteria oosc is the pass fail criteria for roadside safety inspections the purpose of the criteria is to identify critical safety violations those violations render the driver vehicle and or motor carrier out of service until the condition s or violation s are corrected or repaired. The north american standard out of service criteria is the pass fail criteria for roadside safety inspections the purpose of the criteria is to identify critical safety violations those violations render the driver vehicle and or motor carrier out of service until the conditions or violations can be corrected or repaired. North american standard driver out of service criteria policy statement the purpose of this part is to identify violations that render the commercial motor vehicle operator unqualified to drive or out of service the necessity for all enforcement personnel to