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Variation in Free Flow Speed due to Roadway Type and Roadside Environment

Hansen, Gilbert; Garrick, Norman W.; Ivan, John N. and Jonsson, Thomas LU (2007) 86th annual meeting of the Transportation Research Board In Proceedings of the 86th Annual meeting of TRB, CD-ROM
Abstract
This paper explores the effects of roadway and roadside environment characteristics on the speed chosen by drivers. This work is an observational study of 272 segments of two lane roads in Connecticut. Data was collected for lane width, shoulder width, road width, presence of curbs and edge delineation types. For the roadside environment the following variables were also measured: presence of sidewalks, building setback, driveway density and land use types. The sites were categorized into two roadway types of streets and highways, based on their physical form: edge delineation was the main differentiating characteristic. Free flow speed data was measured using hand held radar speed guns. The mean speed was used to represent the speed... (More)
This paper explores the effects of roadway and roadside environment characteristics on the speed chosen by drivers. This work is an observational study of 272 segments of two lane roads in Connecticut. Data was collected for lane width, shoulder width, road width, presence of curbs and edge delineation types. For the roadside environment the following variables were also measured: presence of sidewalks, building setback, driveway density and land use types. The sites were categorized into two roadway types of streets and highways, based on their physical form: edge delineation was the main differentiating characteristic. Free flow speed data was measured using hand held radar speed guns. The mean speed was used to represent the speed characteristics of the roadways. Analysis of variance was employed to identify significant variables in predicting mean speeds. Three separate models were estimated: streets, highways and combined for both streets and highways. The results of the analysis indicate that posted speed limit, land use type, roadway type, roadside parking and building setback are significant in influencing the mean free flow speed on roadway segments. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
modeling, road, speed, traffic
in
Proceedings of the 86th Annual meeting of TRB, CD-ROM
pages
13 pages
publisher
Transportation Research Board, Washington DC, USA
conference name
86th annual meeting of the Transportation Research Board
language
English
LU publication?
yes
id
ada48d9e-b186-4c1c-ba7a-3d10d6b29e1f (old id 582504)
date added to LUP
2008-01-08 15:47:18
date last changed
2016-04-16 07:33:54
@inproceedings{ada48d9e-b186-4c1c-ba7a-3d10d6b29e1f,
  abstract     = {This paper explores the effects of roadway and roadside environment characteristics on the speed chosen by drivers. This work is an observational study of 272 segments of two lane roads in Connecticut. Data was collected for lane width, shoulder width, road width, presence of curbs and edge delineation types. For the roadside environment the following variables were also measured: presence of sidewalks, building setback, driveway density and land use types. The sites were categorized into two roadway types of streets and highways, based on their physical form: edge delineation was the main differentiating characteristic. Free flow speed data was measured using hand held radar speed guns. The mean speed was used to represent the speed characteristics of the roadways. Analysis of variance was employed to identify significant variables in predicting mean speeds. Three separate models were estimated: streets, highways and combined for both streets and highways. The results of the analysis indicate that posted speed limit, land use type, roadway type, roadside parking and building setback are significant in influencing the mean free flow speed on roadway segments.},
  author       = {Hansen, Gilbert and Garrick, Norman W. and Ivan, John N. and Jonsson, Thomas},
  booktitle    = {Proceedings of the 86th Annual meeting of TRB, CD-ROM},
  keyword      = {modeling,road,speed,traffic},
  language     = {eng},
  pages        = {13},
  publisher    = {Transportation Research Board, Washington DC, USA},
  title        = {Variation in Free Flow Speed due to Roadway Type and Roadside Environment},
  year         = {2007},
}