blue siren flasher on the police car. flash light and siren on the emergency car. police signal.

accident action alertness assistance blue bluelight bluesiren bokeh car caraccident city citylife control cop crime danger driving emergency emergencylight firstaid flasher flashing guard headlight help light metropolitan misfortune night nightlife patrol police policedepartment policeflasher policesiren problem protection rescue road safety security siren street surveillance traffic trafficaccident trafficjam transportation urgency warning