The German Aerospace Center (DLR) Institute of Transportation Systems has equipped a junction on the Braunschweig inner city ring road with technology that allows it to be used for traffic research. Known as the research junction, the facility is part of the Application Platform for Intelligent Mobility (AIM). Sensor systems (radar, together with mono and stereo cameras) record various traffic parameters to better understand the behaviour of road users. Both motorised and non-motorised traffic are investigated at the research junction. Such investigations form the basis for innovative solutions and technologies to enable greater safety and efficiency in urban transport.