part of street in city, pavement after heavy snowfall, wet snow melts, puddles, slush and mud impede movement of pedestrians and

road roadway snow winter melts route asphalt way street melt traffic accident dangerous transportation ice paving shine safe grey cold spell mountain drive hazardous risky frosty travel track slush surface danger storm mud bad snowfall dirt reagent weather slippery covered sleet frost season messy transport salt city snowing difficult part pavement after heavy wet puddles impede movement pedestrians vehicles concept safety work public utilities