Evaluating ATIS impacts on air quality


This paper presents an analytical method for evaluating the impact of re-routing traffic guided with Advanced Traveler Information Systems (ATIS) on air quality. The method is applied to a simple road network composed of two routes with one of the routes experiencing incident congestion. Total emissions of three air pollutants (CO, VOC, and NOx) on the two routes are evaluated with and without ATIS. Emissions are evaluated for three time periods: the next five years (1993-1998), the next following five years (1998-2003), and the time period beyond year 2003. The findings indicate that a systemwide reduction of air pollutants can be achieved through the implementation of ATIS. Further, more reduction in emissions of CO and VOC can be achieved with higher ATIS market penetration levels. Reduction in emissions increases with market penetration of ATIS up to a critical market penetration level (fraction of guided traffic) beyond which no further improvement in air quality can be achieved. The critical fraction equals the ratio between the capacity of the alternate route to the corridor demand. Also, reduction in NOx emissions increases with higher ATIS market penetration rates up to the fraction of guided traffic that is associated with network average speed of 40 mph. Reduction in NOx emissions decreases with larger fractions of guided traffic where the improved network average speed becomes larger than 40 mph. Further, the findings indicate that air quality can be improved through the implementation of more strict emission controls. It is found that, even with high market penetration rates, ATIS alone can not compete with better emission controls in reducing emissions. However, emission controls and ATIS together can achieve reductions of emissions that are higher than those achieved by emission controls alone, this is true even for very small market penetrations of ATIS (less than 1%).

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Article; Proceedings Paper



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0028600340 (Scopus)

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