The sub-project “Urban Roads” aims to develop vehicle functions for improved traffic efficiency and reduction of motor vehicle emissions for trips in signal controlled, inner-city road networks. A close integration of intelligent infrastructure with intelligent vehicles here is a prerequisite for achieving emissions reductions and enhancing traffic efficiency along a route.“Urban Roads” – vehicle assistance functions for adaptive deceleration and energy recuperation using traffic signal phase data.
There is considerable potential for improving the efficiency of motor vehicle traffic in urban road networks, particularly on main roads, and for avoiding emissions near signal-controlled intersections. What is lacking is first, accurate data on the time of traffic signal phase changes, which could provide drivers with an optimal predictive horizon to reduce fuel consumption and emissions; second, coordination of traffic signals at successive intersections to minimize unnecessary braking and acceleration.
The sub-project "Urban Roads" is developing basic components to supply vehicles with data and information from traffic information centers, with a focus on predicting when traffic lights change phase (e.g., red to green) in urban road networks. This information from traffic signals will be utilized directly in both passenger cars and trucks driving within urban networks to support novel vehicle functions for efficient driving and optimal energy and emissions. For verification and further optimization of infrastructure signaling, vehicles will provide driving traces to infrastructure centers.