Every one tenth of a kilometer is marked on the freeway with Arabic numerals to indicate freeway mileage; that is, the number of kilometers away from the northern end or western end of the freeway. Exit numbers are based on the freeway mileage. With the notable exception of exit-only signs, which are only expressed in Chinese (but with a right arrow indicating an exit-only lane), exit notification and system route reminder signs in the freeway system are almost identical to their US counterparts.