People is crossing the street on the crosswalk. Sound included. The simplest marked crossings may just consist of some markings on the road surface. These are often called Zebra crossings, referring to the alternate white and black stripes painted on the road surface. Depending on local laws, pedestrians crossing the road may or may not have priority over road traffic when using the crossing. If the pedestrian has priority, then they have an incentive to use the crossing instead of crossing the road at other places.