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Effect of Bus-Stop Spacing on Mobile Emissions in Urban Areas.
| 题名： | Effect of Bus-Stop Spacing on Mobile Emissions in Urban Areas. |
| 作者： | Saka-A.A. |
| 关键词： | *Bus-stops; *Air-pollution; *Motor-vehicle-emissions.;Urban-areas; Exhaust-gases; Buses-; Traffic-flow; Analytical-models; Travel-time; Surveys-; Model-development. |
| 摘要： | The operational effect of bus-stop spacing has been a critical issue. Closely spaced bus stops disrupt the traffic flow on the bus route, particularly during peak hours because buses make frequent stops to provide services to customers. The disruption of traffic flow results in energy loss, increased delay/congestion, transit fleet-size requirement and mobile emissions. This paper describes a set of analytical models developed to assess the effect of bus stop spacing on travel time and mobile emissions in urban areas. It is hypothesized that mobile emissions in urban areas can be significantly reduced, if excessive transit-related stops are minimized through optimal spacing of bus stops. As part of the study, a nationwide survey of transit agencies was conducted to determine the prevalent bus stop spacing policy in urban areas. The survey results show that the average bus stop spacing was approximately 330 meters (m), which is much less than the optimal threshold of approximately 700 m to 800 m obtained from the models described herein. The analysis shows that for a typical bus route in an urban area, the peak hourly reduction in mobile emissions from optimal spacing of bus stops is not substantial for hydrocarbon and nitrogen oxides. |
| 报告类型： | 科技报告 |
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