rolling straight-edge
... that the rolling straight-edge, one of the earliest means of measuring road surface regularity, is still used in Britain today?
... that the <b id="mwB5w"><a href="./Rolling_straight-edge" id="mwB50" rel="mw:WikiLink" title="Rolling straight-edge">rolling straight-edge</a></b>, one of the earliest means of measuring road surface regularity, is still used in Britain today?