Today, traffic noise due to cars, trains, and airplanes is the main noise source in urban areas. In accordance with the European Commission’s Green paper on Future Noise Policy, 22% of the European population are exposed to outdoor A-weighted noise levels higher than 65 dB and more than 45% are exposed to levels between 55 and 65 dB. This corresponds in total to about 250 million people. To improve the situation is a tremendous challenge and the question arises as to whether a good environment be provided (i.e., levels below 55 dB) for all people in today’s cities. Can the demands of 55 dBs only be fulfilled by structuring traffic in a smart way and using noise barriers? Or is a clear change in traffic policy needed from individual traffic to public transport? Different cities with different structures and automobile dependencies are compared in a general study based on statistical data. Detailed information about traffic flow, population structure, and land use is analyzed to verify these results.