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DRIVERS are slowing down to figure out optical illusions on the road.

A series of brain teasers have popped up on roads worldwide as safety officials hope to slow cars down.

An optical illusion of a girl appeared on city streets
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An optical illusion of a girl appeared on city streetsCredit: Preventable

One optical illusion, showing a girl chasing a pink ball in the street, appeared in Canada, according to .

Motorists racing down the street frequently slowed to see the optical illusion.

Drivers noted that the illusion is on a school street.

The illusion, named "Pavement Patty," was temporarily seen on the street in 2010 during the back-to-school season.

"You're probably not expecting a child to run into traffic," a black sign near the optical illusion said.

The illusion wasn't an IQ test.

Instead, lawmakers used is as a ploy to get drivers to slow down.

Pavement Patty was a three-dimensional decal employed near the West Vancouver, Canada, grade school.

The decal was applied to the road to make sure drivers slowed down in the school zone.

Jennifer Smith, then-senior program manager for The Community Against Preventable Injuries, said the installation highlighted driver speed in the school zone.

Everyone sees the cars on the edge of the gorge but you have a high IQ if you can tell what’s really happening

"The idea behind this installation, and all of Preventable’s work, is to get people’s attention and get them thinking about their behavior," Smith said.

"Although this installation was done in 2010, Preventable still receives questions about the decal to this day."

While the installation raised awareness of road law issues, Smith said it was removed after area drivers expressed concern about the girl decal.

"Some people expressed concern that the decal would startle or distract drivers, potentially increasing the risk of a crash," Smith added.

MORE ILLUSIONS

The U.S. Sun has several other optical illusion games.

Readers have attempted to find the number of faces hidden inside this tree:

Readers can easily find the two faces at the bottom - but there are more
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Readers can easily find the two faces at the bottom - but there are moreCredit: Painting Valley

Two people are looking at each other at the trunk of the tree.

However, more can be found inside the branches.

Here is the answer key:

There are ten faces in the branches
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There are ten faces in the branchesCredit: Painting Valley

Also, readers have attempted to find a single four-leaf clover in this artwork.

READ MORE SUN STORIES

There is one four-leaf clover
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There is one four-leaf cloverCredit: Gergely Dudás

The plant is under one of the pink pigs.

Here is the answer key:

The lucky plant is near the bottom left-hand side
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The lucky plant is near the bottom left-hand sideCredit: Gergely Dudás
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