Effect of bus-stop spacing on mobile emissions in urban areas.

Saka, Anthony A.; National Transportation Center (U.S.)

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Effect of bus-stop spacing on mobile emissions in urban areas.

2003-01-01
By Saka, Anthony A.

[PDF-158.13 KB]

English

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Alternative Title:

Effect of bus-stop spacing on mobile emissions in urban areas : prepared for presentation at the 82nd Transportation Research Board Annual Meeting.
Creators:

Saka, Anthony A.
Corporate Creators:

National Transportation Center (U.S.)
Corporate Contributors:

University Transportation Centers Program (U.S.) ; United States. Dept. of Transportation

University Transportation Centers Program (U.S.) ; United States. Dept. of Transportation Less -
Subject/TRT Terms:

[+]

Air Pollution Air Quality Buses Bus Routes Bus Stops Bus Transit Carbon Dioxide Carbon Monoxide Energy Consumption Environmental Impacts Exhaust Gases Fuel Consumption Hydrocarbons Nitrogen Oxides Peak Hour Traffic Spacing Traffic Congestion Traffic Flow Traffic Models Urban Areas
Resource Type:

Tech Report
Geographical Coverage:

United States
Corporate Publisher:

National Transportation Center (U.S.)
Abstract:

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 here. 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 considered substantial for hydrocarbon,

Nitrogen oxides, and carbon monoxide, which actually increased. A substantial reduction was observed for

carbon dioxide and fuel consumption. However, for major urban areas with several bus routes, the

aggregate system-wide impact for the combined morning and afternoon peak hours is expected to be

substantial also for hydrocarbon and nitrogen oxides.
Format:

PDF
Collection(s):

University Transportation Centers US Transportation Collection
Main Document Checksum:

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urn:sha256:9def47489fa4d51a0784d28147b59b29c35f406b1f09119f70edafeb856c6e26
Download URL:

https://rosap.ntl.bts.gov/view/dot/31220/dot_31220_DS1.pdf
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Effect of bus-stop spacing on mobile emissions in urban areas.

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