Children walk past a 3D pedestrain crossing in Bangkok, Thailand November 28, 2019. The Thai children walking on the zebra crossing look as if they are stepping from one white board, floating well above the road, to the next - but it is just an optical illusion, created by a volunteer group aimed at making roads safer for pedestrians. REUTERS/Chalinee Thirasupa

A dog walk past a 3D pedestrain crossing in Bangkok, Thailand November 28, 2019. Up close the trick of perspective is lost, but for any driver approaching the crossing the sight of people apparently walking on free floating white boards should make them slow to a stop. REUTERS/Chalinee Thirasupa

A man walk past a 3D pedestrain crossing in Bangkok, Thailand November 28, 2019. The zebra crossing outside the main entrance to Wat Bueng Thong Lang school on the outskirts of Bangkok, was painted by students and volunteers, with funding from Thailand's Government Savings Bank. REUTERS/Chalinee Thirasupa

People paint a 3D pedestrian crossing in Bangkok, Thailand November 16, 2019. REUTERS/Prapan Chankaew

People paint a 3D pedestrian crossing in Bangkok, Thailand November 16, 2019. Picture taken November 16, 2019. REUTERS/Prapan Chankaew