Siemens environmentally oriented traffic management calculates the emissions of oxides of nitrogen, fine dust and carbon dioxide on the basis of current traffic conditions: traffic density, vehicle speeds and the proportions of the different classes of vehicle. The calculations of the spread of pollution also incorporate real-time meteorological data and the profiles of the adjacent buildings. The current profile of urban air quality is completed by adding external pollution not resulting from traffic, such as that from local factories and power generation plants, and pollution coming in from remote sources. The open Sitraffic platform also facilitates the integration of suitable customer-specific emission and pollution spread models. The pollution data generated in real-time is taken as the basis for deciding the optimal traffic control strategy. The traffic is then controlled to the appropriate extent where and when needed. High pollution levels produced by, for example, a combination of atmospheric inversion and light winds trigger stronger measures to reduce emissions, whereas the free flow of traffic can be given top priority on days when there is no danger of limits being exceeded, and there is no need to impose traffic restrictions on account of environmental factors. In this way, Sitraffic contributes to efficient compliance with threshold values.

Further information on intelligent traffic control systems from Siemens Mobility at http://www.siemens.com/traffic

This press release is supplemented by a photo which you can view on the Internet at: http://www.siemens.com/mobility-pictures/MO200802018