Fixing roads

This vehicle is used build, or repair, roads. I'm guessing that the large caterpillar wheels are designed in that way to spread its weight across a larger surface - else the vehicle would be damaging more than it was fixing!

Roadworks are terribly inconvenient and seem to appear from nowhere at the least opportune time; which is normally when I'm running late. But, even though they're frustrating at the time, I'd far rather have the momentary inconvenience than a lifetime of dodgy roads!