Road congestion in the UK costs of the order of £20bn pounds per annum. Urban areas would considerably benefit from a sensor network infrastructure able to detect traffic information at high spatial and temporal resolutions. In this project, we investigate two distinct approaches to collecting and disseminating traffic information: using special-purpose stationary sensor nodes (inductive loops, laser or infrared sensors) that collect and disseminate traffic information at regular intervals, and using mobile sensor nodes, e.g. vehicles equipped with GPS and wireless transceivers, that opportunistically collect information as they are roaming thru the city.
