Haul road safety warning systems comprised of Doppler radar speed sensors with wireless communication capabilities, luminous road safety stop signs with wireless receivers for receiving information from Doppler radar speed sensors, and non-luminous, non-mechanical metal and non-metal road safety signs with wireless receivers for receiving information from Doppler radar speed sensors

'capabl':15 'communic':14 'compris':6 'doppler':8,28,54 'haul':1 'inform':26,52 'lumin':16,35 'mechan':38 'metal':39,43 'non':34,37,42 'non-lumin':33 'non-mechan':36 'non-met':41 'radar':9,29,55 'receiv':23,25,49,51 'road':2,17,44 'safeti':3,18,45 'sensor':11,31,57 'sign':20,46 'speed':10,30,56 'stop':19 'system':5 'warn':4 'wireless':13,22,48

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