What is the purpose of lane lines on wide carriageways?

The purpose of lane lines on wide carriageways is primarily to divide the road into lanes. These lines help organize traffic by providing clear markings that indicate where vehicles should travel, enhancing overall safety on the road. Lane lines ensure that vehicles maintain a consistent flow and stay within designated areas, reducing the risk of collisions and facilitating smoother driving.

While other options such as indicating speed limits, directing pedestrian traffic, or highlighting parking areas can play significant roles in road design and safety, they are not the primary purpose of lane lines. Lane lines specifically focus on road division for vehicle movement, making them critical in maintaining order on wider carriageways.