Identifying Highway Stripes By James Davis Highway stripes use different colors and markings to convey important information to drivers: White lines: Separate lanes of traffic moving in the same direction. Yellow lines: Separate lanes of traffic moving in opposite directions. Double yellow lines: Prohibit passing in both directions. Solid white lines: Indicate the edge of the road or a lane barrier. Dashed white lines: Allow lane changes or indicate an exit lane. Solid yellow lines: Indicate a no passing zone. Dashed yellow lines: Indicate a passing zone with caution. Solid white lines with diagonal stripes: Warn drivers of an upcoming lane reduction or merge. Crosswalk lines: Mark pedestrian crossing areas. Stop lines: Indicate where vehicles must stop at an intersection or crosswalk. It is important to follow these markings to ensure safety on the road.