We have an asphalt driveway with a crack. To be more specific, we have a "shared" driveway, and our private drive runs off of that main drive. There is a seam at that point.

Yes, the sides will shrink and the seam will get wider. Yes, ideally, we should re-seal it all to make the crack less obvious. I've been "mentioning" that to my husband periodically, but we'd have to involve four families for the cost, one of which has the house for sale. We live with the crack. It's not that big of a deal. Our house and personal drive are 8 years old; the main drive is about 10-11 years old. We've filled the crack a couple of times with a black filler but that only lasts a certain amount of time. Structurally there's not a problem, though.