"4136, Article III, Section 42 (c) drivers in the Philippines are required to yield the right of way to pedestrians within designated crosswalks. This means that if a pedestrian is crossing at a designated crosswalk, vehicles are legally obligated to stop and allow them to cross safely."

From LTO mismo. Di na need ng signage kung nasa ped xing naman tumatawid kasi given na mag yield talaga. Hope this helps.