Exploratory Analysis of Deceleration Rates in Urban Corridors Using SHRP-2 Data

This study conducted an exploratory analysis of deceleration rates in urban corridors using SHRP-2 data. Deceleration rates and other variables were collected from the InSight website by using three scenarios. The study only looked at near-crash events during the daytime that involved other vehicles in non-highway urban roadways. A total of 155 events were analyzed. The data analysis yielded a model where deceleration during baseline conditions and deceleration during near-crash events were significant. Another variable in the model, though not statistically significant, was number of through lanes. For both baseline and event conditions, there was an increase in predicted deceleration rate. For near-crash events there was an increase of range in predicted values between the minimum and maximum deceleration with an increase in the number of lanes. The results of the model can be interpreted to mean that when there was no interference from other vehicles (baseline conditions) drivers will decelerate at a rate lower than 11.2 ft./s². However, when there was an unexpected event due to other vehicles, such as pulling into the driving lane from an intersection or driveway or turning into a driveway, the deceleration rates will increase. The range of deceleration under such events varies according to the driving environment. Further research is needed to assess roadway geometry, roadway operations, driveway density, and deceleration rate. In addition, vehicle configuration, driver characteristics, and further exploration of driver behavior may enable the discovery of possible trends in deceleration and drivers.

• Supplemental Notes:
  • This paper was sponsored by TRB committee AHB65 Standing Committee on Operational Effects of Geometrics. Alternate title: Exploratory Analysis of Deceleration Rates in Urban Corridors Using SHRP 2 Data
• Authors:
  • Lindheimer, Tomas
  • Avelar, Raul
  • Shirinzadeh, Maryam
  • 0000-0002-2061-2771
  • Brewer, Marcus
  • Dixon, Karen K
  • 0000-0002-8431-9304
• Conference:
  • Transportation Research Board 97th Annual Meeting
  • Location: Washington DC, United States
  • Date: 2018-1-7 to 2018-1-11
• Date: 2018

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: 16p

Subject/Index Terms

• TRT Terms: Deceleration; Highway safety; Transportation corridors; Urban highways
• Subject Areas: Highways; Operations and Traffic Management; Safety and Human Factors;

Filing Info

• Accession Number: 01659917
• Record Type: Publication
• Report/Paper Numbers: 18-01552
• Files: TRIS, TRB, ATRI
• Created Date: Feb 13 2018 9:52AM