Probably. Since the movement to the other square probably requires a full movement point, if you were on a road and then going off-road, it wouldn't reflect the actual points you have available.
I wish Elemental would do what some other games doing (I'm thinking of Warlock now) where they show movement in fractions. Moving to a tile without enough points could deduct your current balance (let's say .7) and move you there next turn minus the remainder (in this case .3 off your starting value). It works much better to explain how roads work for giving bonus travel.
