Traffic congestion is a condition on any network as use increases and is characterized by slower speeds, longer trip times, and increased queueing. The most common example is the physical use of roads by vehicles. When traffic demand is great enough that the interaction between vehicles slows the speed of the traffic stream, congestion is incurred. As demand approaches the capacity of a road (or of the intersections along the road), extreme traffic congestion sets in. When vehicles are fully stopped for periods of time, this is colloquially known as a traffic jam. (reference Wilkepedia)
Transportation forecasting is the process of estimating the number of vehicles or travelers that will use a specific transportation facility in the future. A forecast estimates, for instance, the number of vehicles on a planned freeway or bridge, the ridership on a railway line, the number of passengers patronizing an airport, or the number of ships calling on a seaport. Traffic forecasting begins with the collection of data on current traffic. Together with data on population, employment, trip rates, travel costs, etc., traffic data are used to develop a traffic demandmodel
Traffic trends and urgent transport improvements required for NSW.
Traffic is an environmental social and economic problem, so it affects all of us and solutions are sometimes very complex and requires very strong political will to implement radical transport schemes. There is strong need to invest strongly in sustainable and environmental friendly transport, while the transport user should also be allowed to exercise freedom of choice when making a decision for a journey. The reduction of traffic congestion impacts positively on the economy and commerce as products and services reach the markets faster thus reduces costs for consumers. Therefore, high investments in transport and traffic projects such as heavy and light rail and the modernization of the total bus fleet in the State of NSW are essential and urgent for the states economy.