<P> Since the National Highway 1 was built with older designs, all weigh stations have older scales so trucks must stop . Weigh stations along the National Highway 3 have weigh - in - motion scales at 7 central and southern toll stations, but northern stations at Cidu, Shulin, and Longtan have traditional scales where trucks must stop . </P> <P> The Taiwan Area National Freeway Bureau applies for periodical inspections of truck scales every three months . Truckers entering a weigh - in - motion scale are advised not to accelerate or decelerate suddenly, or they may be required to be weighed again . </P>

When do you have to go through weigh station