[IDEA] for truck route back-tracing

Currently buildings only show how many items of a certain kind are being delivered. But it would be useful to be able to highlight the exact trucks that are delivering the items.

For example, I lately had a bad traffic problem at a computer production place that I oversaw. At the same time my habitats didn’t get enough computers while in the production overview it looked like I was producing enough.
A feature like that would have helped me to find the traffic jam, as it turned out that the trucks were stuck in a train station and therefore not visible.