pedestrian pavement sign with oil and water rainbow effect on asphalt. eco oil concept.

pedestrian sign pavement oil water rainbow street asphalt symbolic limit concept zone urban eco green environmental environment pedestrianisation walk active travel surface pollution background wet petrol reflection weather road fuel color colorful sidewalk liquid gasoline industrial leak spill city rain car film pattern yellow roadsign painted walkway public way lane outdoor symbol footway icon human traffic transport track footpath marking cities