'10' means that p****engers simply don't care about speed when travelling as much as 6 miles. Which is a bit unrealistic. And also, given the way the game is laid out, there are lots of *less than 40 tile* local trips which should care *somewhat* about speed. As it is local trips simply don't care about speed at all. Which they should. If only a little.
I suggest cutting it down to 4 (a bit under 3 miles, or 12,000 feet, or 16 tiles).
This seems like a sensible suggestion. I'll adopt it for the next release. Thank you :-)