Originally Posted by
cyccommute
I hate to reply to my own post but I have been noticing something on older paving that covers the pavement cuts. With traffic and time (lots of time, on the order of years), the pavement over the saw cuts will start to crack. I've been noticing the lone linear cracks appearing at several intersections but they are can be difficult to detect because they are subtle. There's no hope for fresh paving jobs.
Around here the saw cuts in the pavement are usually just filled with black tar or sealant. Is that what you're seeing? I have NEVER seen stop lights with detector loops that were paved over with no visible cuts.