A white line on the crosswalk of a city street, also called zebra crossing. Zebra crossing originated from jumping stones in ancient Rome. As early as in ancient Rome, on some streets of Pompeii, chariots and horses crossed with pedestrians, which often caused traffic jams and accidents in the city. To this end, people separated the sidewalk from the carriage road, raised the sidewalk, and built blocks of stones protruding from the road near Ma Lukou as signs to instruct pedestrians to cross the street. Pedestrians can step on these jumping stones and slowly cross the road. When the carriage is running, the jumper is just between the two wheels of the carriage. Later, many cities used this method. At the end of the 19th century, with the invention of automobiles, the traffic in the city was rolling, and people were crossing the street at will, which hindered the traffic. The previous kind of stone jumping could not avoid the frequent occurrence of traffic accidents.
In the early 1950s, the British designed a kind of crosswalk on the street, which stipulated that pedestrians should only take crosswalks when crossing the street, so a series of striking crosswalks appeared on the streets of London, which looked like white stripes on zebras, so people called it zebra crossing. When the driver sees this white line, he will automatically slow down or stop to let pedestrians pass safely. Zebra crossings are still everywhere in the streets.