I've seen this before with backlogged maintanence, particularly at very extremely busy crossings with traffic lights and where loads of trucks come. Trucks in particular can really be damaging on asphalt when they gotta stop for a red light and when they have to pull up when the light turns green. And when the weather is very hot (over 35 degrees Celcius, or close or above 100 F) it can happen even more that the asphalt can become more liquid. I've seen road that were were completely liquid due to hot weather... well liquid, they looked like tar, and your shoe could get stuck to it. I'm not sure, but it seems very likely that is what may have caused that. The line drawing machines used to day cannot easily make a "wiggle" like that.
