Why is the water pooling in the street?

The city just repaved our street. The next day it rained. When I came outside in the morning, it still smelled like tar outside, but I saw the strangest thing.  Water was beading up on the surface of the new asphalt in interesting ways. Here is a picture of it . . .

The pools of gathering water were about the size of the palm of my hand.  Because the road is sloped, one pool of water would morph into another to make larger pools which would roll down the street and into the gutter, like this . . .

It was quite an amazing site, because this was happening all over the street. A normal person might not care too much about this enough to stop an watch.  But, I was looking at the phenomenon as a great example of the difference between the molecules of tar and the molecules of water.

Molecules of water are small, and have an uneven spatial distribution of electrical charge. What's more for water is that because the atoms are small and polarized, they are able to strongly bond with each other.  Tar on the other hand, is a long chain of carbon based molecules, which are not polarized.  We perceive the water as watery, and the tar as oily. We all know from experience that oil and water don't mix, but this was a fun real-life example. You'll know you are a nerd if you look twice next time you are around tar during a rain shower.