Why are zebra crossings white and black?

Why are zebra crossings white and black? 

PROF WAQAR HUSSAIN

   

Roads are made from black tar and the easiest way to make a patch visible was to draw white bands on the black road that can be seen easily during the day and night. This patch having black and white bands had resemblance with white and black strips of animal zebra so it came to be known as zebra crossing. Otherwise, its original name was Pedestrian Crossing. Now with the advancement of technology, people are using yellow in some places.

         The reason behind the white or black lining of zebra crossing is the visibility at day and night and also the convenience of just painting a white band on the already black road.