Transportation engineering is a multidisciplinary field that involves the design, planning, development and maintenance of various transportation systems. There are several synonyms for transportation engineering, such as traffic engineering, road engineering, highway engineering, mobility engineering, and transportation planning. Traffic engineering primarily focusses on the design and control of traffic flow on roads and highways. Road engineering refers to the design and maintenance of roads and highways. Mobility engineering is more inclusive and covers all modes of transportation, including public transportation, bicycles, and pedestrians. Transportation planning involves the strategic planning of transportation infrastructure, including land use, public policies and funding mechanisms. All of these terms come under the umbrella of transportation engineering, which plays a vital role in facilitating safe, efficient and sustainable transportation of people and goods.