Optical illusions used as virtual speed humps
‘Optical illusions are to be painted onto city streets in the United States in an effort to slow traffic.
The images will appear as 3D barriers to oncoming motorists, although the road is completely flat.
The fake speed humps are being installed at 100 junctions around Philadelphia, Pennsylvania as part of a campaign against aggressive driving.
“The goal is to change the mindset,” said Philadelphia’s chief traffic engineer Charles Denny.
“The driver sees this in the roadway, and they think that it’s some protrusion up out of the roadway, and not a perfectly flat surface. So they slow down before they drive over it.”‘
