Effectiveness of speed measures to improve roundabout capacity “case study”

Author

Abaza, Osama A.

Author_Institution

Sch. of Eng., Univ. of Alaska Anchorage, Anchorage, AK, USA

fYear

2012

fDate

16-19 Sept. 2012

Firstpage

130

Lastpage

133

Abstract

The objective of this study is to analyze the effectiveness of speed measures to improve capacity at the roundabouts under near saturation level. Alaska Department of Transportation and Public Facilities introduced measures of using speed humps on multilane roundabout to slow down vehicular traffic entering the roundabout which might improve safety and capacity. Spot speed, vehicular volume and queued data have been collected and analyzed before and after the speed measures. Results show use of speed humps bring insignificant change in speed profiles through the roundabout with little or no effect on capacity. In addition, measured and calculated queue lengths also show no significant change.

Keywords

road traffic; velocity measurement; Alaska Department of Transportation and Public Facilities; multilane roundabout; roundabout capacity; speed humps; speed measures; vehicular traffic; Cities and towns; Delay; Queueing analysis; Roads; Vehicles; Roundabout; capacity; measures; queues; speed humps; spot speed;

fLanguage

English

Publisher

ieee

Conference_Titel

Intelligent Transportation Systems (ITSC), 2012 15th International IEEE Conference on

Conference_Location

Anchorage, AK

ISSN

2153-0009

Print_ISBN

978-1-4673-3064-0

Electronic_ISBN

2153-0009

Type

conf

DOI

10.1109/ITSC.2012.6338749

Filename

6338749