I was told that same thing about my driveway. I had planned on having it done but then time got away from me and its now 10 years old and in great shape. I do make sure that no plant life comes up by using roundup.
PJ
I just left highway dep't service after some years.. The problem today is with the binders used. Not too many years ago, asphalt could be layed down and wait 7 years before sealing. Today, and depending on who isdoing the mix, asphalt can stay 7 years and other times within 6 months something has to be done. All depends how much binders the mixing plant wants to use in any given batch. There are several other minor variables that could play into it. I switched the town over to chip seal, as mentioned above.. We had to have a sweeper and go over fresh chip seal within a few hours because of winshield damage. Again, some roads needed it almost immediately and others could/can wait.