What does SSD stand for in the context of traffic engineering?

In the context of traffic engineering, SSD stands for Stopping Sight Distance. This term refers to the minimum distance required for a driver to see an object on the roadway and come to a complete stop before hitting it. It is critical for ensuring safe driving conditions, as it directly affects roadway design, intersection layout, and visibility standards.

Stopping Sight Distance takes into account various factors such as the driver’s reaction time, vehicle speed, and the braking capabilities of the vehicle. By establishing appropriate SSD, engineers can help to prevent accidents and improve overall safety on the roads. Therefore, understanding and applying the concept of Stopping Sight Distance is essential in the planning and design of effective traffic systems.