Minimum speed limit of 10 km/h was needed in the past due to engine limitations. Multiple user tests have shown that the minimum speed is not needed anymore. The new minimum of 0 km/h allows for example setting walking speed for vehicles (<10 km/h).

To avoid problems with negative speeds (driving backwards) and zero speed, the current change switches from 10 km/h minimum speed to 3 km/h minimum speed. This seems to be the optimal solution to allow all relevant speeds including walking speed.

Officially the minimum required speed is 10 km/h in the master. Lower minimum needed to set car speed to walking speed of accompanying soldiers. Problems have been reported with 3 kmh/ using cars like ATVs.  Thus the new commit is set to 5 km/h minimum speed. Not tested with ATVs yet.