This is the impressive moment a bodybuilder attempted to lift a heavy road barrier like a barbell ... the 'weights,' consisting of two yellow-and-black painted stone bases connected by two ...

But these seemingly simple barriers are actually deceptively sophisticated: Their designs have been well-tested and tweaked to ensure driver safety on both sides of the road in the event of a crash.

If you commute regularly, you’ve seen them countless times– those alternating black and yellow stripes running along road dividers. They appear so frequently that most of us no longer notice them.

The absence of a median barrier on the stretch of road ... where we would normally have a double solid yellow down the middle of the road, we're going to separate those yellow lines by up to ...