What is the significance of colours and different lines on road ? WHITE LINES painted on the pavement indicate traffic traveling in your direction. Broken White Line: you may change lanes if it is safe to do so. Solid White Line: requires you to stay within the lane and also marks the shoulder of the roadway. YELLOW LINES mark the center of a two-wayroad used for two-way traffic. Subscribe- @TodayILearn 340 views01:52