[user104658]

Originally Posted by arista

The Toddler then knows

never to run across a main road.





Its all about saving lives

The toddler knows never to run into the road because they'll get a smack from a parent. So as soon as a parent isn't around to see them, they think it's "safe" because they won't get smacked.

Here's what saves lives; don't have small children unsupervised next to roads until they're old enough to understand the actual danger.