Abstract

Over the past few years the population of older drivers has substantially increased across the United States. Older drivers are a group of special interest because of their potential age-related deficiencies. It is essential to understand their driving behavior and adjust the conditions of roadway systems according to their requirements. Likewise, driving behavior of older drivers needs to be considered in order to adequately estimate capacities at intersections. In the past few years, research projects were performed by the University of South Florida to analyze the differences of driving behavior among different driver age groups. Typically, the driving behavior of older drivers was evaluated by analyzing their start-up lost time and saturation headway at signalized intersections as compared to young and mid-age driver groups. Research results were based on data collected from signalized intersections with different land-use types. These intersections are located in west and central Florida where the elderly population has been increasing rapidly in recent years. From the results it was found that the presence of older drivers significantly reduced intersection capacity at all study sites because of their higher lost times and lower saturation flow rates. Therefore, driving behavior of older drivers should be considered in designing intersections located in places with a significant older driver population. In the research, models were developed to predict start-up lost time and saturation headway values generated by older drivers. Then, the variation in capacities with an increasing percentage of older drivers in the traffic stream was modeled. Finally, adjustment factors for different percentages of older drivers were developed to adjust intersection capacity. These factors are believed to account for the presence of older drivers in the traffic stream. The adjustment factors may be used in capacity analysis and design procedures for intersections with a significant older driver population.

Document type: Article

Full document

The PDF file did not load properly or your web browser does not support viewing PDF files. Download directly to your device: Download PDF document

Original document

The different versions of the original document can be found in:

https://doaj.org/toc/0386-1112
https://api.elsevier.com/content/article/PII:S0386111214600315?httpAccept=text/plain,
http://dx.doi.org/10.1016/s0386-1112(14)60031-5 under the license https://www.elsevier.com/tdm/userlicense/1.0/
http://ci.nii.ac.jp/naid/10006466472,
https://www.iatss.or.jp/common/pdf/en/publication/iatss-research/24-2-08.pdf,
https://iatss.or.jp/english/research/24-2/pdf/24-2-08.pdf,
https://trid.trb.org/view/674791,
[=citjournalarticle_29162_25 https://www.safetylit.org/citations/index.php?fuseaction=citations.viewdetails&citationIds[]=citjournalarticle_29162_25],
https://academic.microsoft.com/#/detail/2100846896
Back to Top

Document information

Published on 01/01/2020

Volume 2020, 2020
DOI: 10.3389/fnhum.2020.00183
Licence: Other

Document Score

0

Views 0
Recommendations 0

Share this document

claim authorship

Are you one of the authors of this document?