According to Wikipedia, traffic engineering is a branch of civil engineering that focuses on the safe and efficient movement of people and goods on roadways. It applies engineering principles to improve traffic flow while enhancing safety for motorists, pedestrians, and cyclists. Traffic engineering deals with the operational aspects of transportation systems rather than the construction of infrastructure itself.

Traffic engineers design and manage traffic control systems, including traffic signals, road signs, pavement markings, pedestrian crossings, and bicycle facilities. They also study road geometry and traffic patterns to reduce congestion, improve travel efficiency, and minimize the risk of road accidents. A major part of their work involves identifying locations with high crash rates and developing measures to improve road safety.

Traffic engineering is closely related to several other disciplines, including transportation engineering, highway engineering, pavement engineering, transportation planning,urbanplanning, bicycle transportation engineering, and human factors engineering. Engineers in this field use traffic studies and data analysis to determine speed limits, manage traffic during road construction, and predict the effects of new commercial or residential developments on road networks. Modern traffic engineering also incorporates Intelligent TransportationSystems (ITS), which use computers, sensors, and communication technologies to monitor and optimize traffic flow in real time