In our work, we focused on the traffic conflict between car and motorcycle, which is common in China. In our design requirement process, we presented two traffic conflict situations and analyzed their key factors. Initial positioning and trajectory of encountered motorcycles were found to be the most important but difficult point in car driver’s awareness. Therefore, we propose two different prototypes of a LED visualization components for the car driver. This include changing color schemes and alteration of the amount of light in lamps. The goal was to design support to help the driver to detect motorcycles in the two corresponding traffic situations. The results show that changes in the amount of light in the lamps was performing better. In addition, a large set of qualitative feedback was collected and analyzed in the experiment.