I agree that 'track' is probably not appropriate.  It seems to have been redesignated more recently though.
Although service roads can be through routes, there are some apps that treat service roads as if they don't exist.  That doesn't matter if it's a back alley, running parallel and close to a residential street; or if it's a carpark aisle; etc.  In this case, there isn't a nearby alternative route, which hopefully explains more comprehensively why I didn't think it should be marked as a service road.