Originally Posted by You Need A Thneed
Future extra lanes. Wide Load corridor.
Believe me, it's not about wide loads. There's no such designation as "wide load corridor". High loads? Oversize loads? Yes. But none will ever require you to have a wide open median like that, ever.
It's a cost saving measure. Originally it was proposed as a concrete median. Paint is cheaper than concrete, though the size of that painted median is hilarious looking.