00978542

Component

https://doi.org/10.3141/1867-19

http://scholar.google.com...ouki&publication_year=2004

Gridlock along arterial systems in New England is often the result of adverse weather conditions, which can render the normal signal plans unsuitable. The current study has two main objectives: (a) to assess the impact of inclement weather on traffic flow parameters at signalized intersections in northern New England and (b) to evaluate the likely operational benefits of implementing special timing plans for inclement weather conditions. A signalized intersection in Burlington, Vermont, was selected, and at least 30 h of videotaped data were collected over a period of 3 months. The weather and road surface conditions were categorized into six different classes, and values for the saturation headways and start-up lost times were collected and statistically analyzed. A signalized collector was then selected as a case study for evaluating the likely benefits of developing special timing plans for inclement weather. Optimal signal plans were developed for the corridor for the six different weather conditions. The likely benefits of the special plans were then determined by comparing travel conditions under the optimal inclement weather timing plans with conditions assuming the optimal dry-condition plan would remain unchanged. The study reveals that inclement weather has a significant impact on saturation headways, particularly once slushy conditions start. Start-up lost time, however, does not appear to be significantly affected by inclement weather. The study also shows that there are benefits to be expected from implementing special signal plans for inclement weather.

This paper appears in Transportation Research Record No. 1867, Freeway Operations and Traffic Signal Systems 2004.

00978523

English

p. 163-171

2004

Transportation Research Record

0309094615

Figures (3) ; References (11) ; Tables (5)

Benefits; Case studies; Impact studies; Saturation flow; Signalized intersections; Traffic flow; Traffic signal timing; Videotapes; Weather conditions

Inclement weather; Start-up lost time

Bennington (Vermont); New England

Highways; Operations and Traffic Management; I73: Traffic Control

TRIS, TRB, ATRI

Sep 23 2004 12:00AM

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