<html> <head> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii"> <meta name=Generator content="Microsoft Word 10 (filtered)"> <style>  </style> </head> <body lang=EN-US link=blue vlink=purple> <div class=Section1> In our new and very modest “beginning system” discussion space that you will see as the last line on the left menu of http://www.newmobility.org – a space which as you will recall has spun directly out of our exchanges and shared concerns here – you will see that we have added a ‘latest news’ link, which this morning spit out the following interesting piece (see <a href="http://library.witpress.com/pdfs/abstracts/AIR05/AIR05059AU.pdf">http://library.witpress.com/pdfs/abstracts/AIR05/AIR05059AU.pdf</a> for more).     A study on motorcycle-based motorization and traffic flow in Hanoi city: toward urban air quality management T. Shimizu, A. T. Vu & H. M. Nguyen Department of Civil Engineering, The University of Tokyo, Japan Abstract Rapid motorcycle-based motorization due to the economic growth presents severe environmental issues in Hanoi city, Vietnam. This paper discusses the required policies and scientific research needed to move towards urban air quality management in Hanoi. The effect of the taxation system, the demand shift from motorcycle to bus, and signal systems that are easily implemented in the short term on the urban air quality are analyzed. The motorcycle taxation system has little effect on the regulation of the growth of ownership. Improvement of the bus service level does not lead to a great increase of bus share. The signal system cannot make the traffic flow more environment friendly. Therefore, the measures for decreasing emission factors by technological approaches such as inspection systems and attachment of a catalyst should be implemented urgently as well as the improvement of the signal system in Hanoi. Keywords: motorcycle penetration, modal shift, motorcycle traffic flow, air quality management.   </div> </body> </html>