GREAT QUESTION: Move rules are in the DR Core book but I am happy to summarize them here.
Move doesn’t quite represent miles per hour or other speed reference. It is designed so at a glance you can tell which vehicles can catch up with and/or outrun other vehicles.
A few quick examples:
Move of 3 is your average human
Move 8 is a good horse
Move 10 is a good car
Move 13 is a hot rod or race car
Move 15 is an good airplane
Move 18 is a good combat aircraft circa 1990s earth
Move 20 is your average starfighter speed in atmosphere
Move 30 is a high end combat starfighter in atmosphere
Move 50 is a reliable starship’s engines in space
Move 100 is only the fastest racing starships in space .(very very rare)
Distance traveled has less to do with speed from a metagame perspective than type of Move.
A Move 10 car is not as fast as a Move 10 (Hover) as the Hover does not need roads and can travel directly.
A Move 3 walking guy would take a few weeks to get from Unen to Karov.
A Move 10 vehicle would make it from Unen to Karov in two-three days
A Move 10 Hover would make it from Unen to Karov in about a day of travel
A Move 10 Flyer would make it from Unen to Karov in a few hours
A Move 20 Flyer would make it from Unen to Karov in about an hour.
Move will never be held against a player except in vehicle on vehicle combat.
Players are encouraged not to worry too much about how long it takes to get from one place to another, unless everyone is on foot.
Feel free to utilize any vehicles you have creatively against foot troops as their movement will give those vehicles a decided advantage.