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Effects of gradient on speed of vehicles on an Iranian single carriageway road

The effect of an upgrade and its length is very significant for traffic flow characteristics. Road traffic consists of vehicles of wide ranging physical dimensions, weight and dynamic characteristics such as engine power, acceleration rate, etc. Due to these variations, the effect of grade on vehicl...

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Main Author: Ghobakhlou, Ida
Format: Thesis
Language:English
Published: 2012
Subjects:
TE Highway engineering. Roads and pavements
Online Access:http://eprints.utm.my/id/eprint/32039/1/IdaGhobakhlouMFKA2012.pdf
http://eprints.utm.my/id/eprint/32039/
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spelling my.utm.320392018-04-17T09:16:20Z http://eprints.utm.my/id/eprint/32039/ Effects of gradient on speed of vehicles on an Iranian single carriageway road Ghobakhlou, Ida TE Highway engineering. Roads and pavements The effect of an upgrade and its length is very significant for traffic flow characteristics. Road traffic consists of vehicles of wide ranging physical dimensions, weight and dynamic characteristics such as engine power, acceleration rate, etc. Due to these variations, the effect of grade on vehicles may vary significantly among vehicle categories. Variation in the level of the interaction between vehicles on upgrades may result in different sets of traffic flow characteristics. Hence, it is necessary to study speed of vehicle on upgrades. This study evaluates the influence of gradient in vehicle speed in a single carriage way in Iran. Quantify speed reduction for main types of vehicles on various road grades, and establish relationships between speed and road grades are steps to achieve the aim. Road of the study is two lane road located in north of Iran between Semnan and Firouzkouh. It was found that the effect of grade on the vehicle performance speed may not be significant beyond a length of 600 to 800 meter length of upgrade. Operation on a 2-3-percent upgrade has only a slight effect on passenger car speeds. On steeper upgrades (4-6percent upgrade), speeds decrease progressively with increases in the grade. The effect of grades on truck speeds is much more pronounced than on speeds of passenger cars. Speeds of trucks decrease by 6 percent or more on upgrades as compared to their operation on the level. 2012-08 Thesis NonPeerReviewed application/pdf en http://eprints.utm.my/id/eprint/32039/1/IdaGhobakhlouMFKA2012.pdf Ghobakhlou, Ida (2012) Effects of gradient on speed of vehicles on an Iranian single carriageway road. Masters thesis, Universiti Teknologi Malaysia, Faculty of Civil Engineering.
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
language English
topic TE Highway engineering. Roads and pavements
spellingShingle TE Highway engineering. Roads and pavements
Ghobakhlou, Ida
Effects of gradient on speed of vehicles on an Iranian single carriageway road
description The effect of an upgrade and its length is very significant for traffic flow characteristics. Road traffic consists of vehicles of wide ranging physical dimensions, weight and dynamic characteristics such as engine power, acceleration rate, etc. Due to these variations, the effect of grade on vehicles may vary significantly among vehicle categories. Variation in the level of the interaction between vehicles on upgrades may result in different sets of traffic flow characteristics. Hence, it is necessary to study speed of vehicle on upgrades. This study evaluates the influence of gradient in vehicle speed in a single carriage way in Iran. Quantify speed reduction for main types of vehicles on various road grades, and establish relationships between speed and road grades are steps to achieve the aim. Road of the study is two lane road located in north of Iran between Semnan and Firouzkouh. It was found that the effect of grade on the vehicle performance speed may not be significant beyond a length of 600 to 800 meter length of upgrade. Operation on a 2-3-percent upgrade has only a slight effect on passenger car speeds. On steeper upgrades (4-6percent upgrade), speeds decrease progressively with increases in the grade. The effect of grades on truck speeds is much more pronounced than on speeds of passenger cars. Speeds of trucks decrease by 6 percent or more on upgrades as compared to their operation on the level.
format Thesis
author Ghobakhlou, Ida
author_facet Ghobakhlou, Ida
author_sort Ghobakhlou, Ida
title Effects of gradient on speed of vehicles on an Iranian single carriageway road
title_short Effects of gradient on speed of vehicles on an Iranian single carriageway road
title_full Effects of gradient on speed of vehicles on an Iranian single carriageway road
title_fullStr Effects of gradient on speed of vehicles on an Iranian single carriageway road
title_full_unstemmed Effects of gradient on speed of vehicles on an Iranian single carriageway road
title_sort effects of gradient on speed of vehicles on an iranian single carriageway road
publishDate 2012
url http://eprints.utm.my/id/eprint/32039/1/IdaGhobakhlouMFKA2012.pdf
http://eprints.utm.my/id/eprint/32039/
_version_ 1643648923006402560
score 13.211869

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