EFFECTS OF ACCESS CONTROL ON SAFETY ON URBAN ARTERIAL STREETS

Access control techniques are used to improve traffic performance and safety on highways. One important benefit of access control is improved safety. For a quantitative assessment of the benefits of access control on safety, impact models are needed to predict crash frequencies based on the geometric and access control characteristics of the segments. The objective of this research was to develop regression models to predict crash frequencies on urban multilane arterial segments. To develop these models, data were collected on geometric and access control characteristics of the segments and the number of crashes on the segments by severity type. Negative binomial regression models were developed to predict the total number of crashes, number of property-damage-only crashes, and number of fatal and injury crashes. The three models have a similar structure. The exposure-to-risk variables include segment length, number of years, and annual average daily traffic. The significant factors include density of access points, proportion of signalized access points, presence of an outside shoulder, presence of a two-way left-turn lane, and presence of a median with no openings between signals. The results indicate that access control has a beneficial effect on safety.

• Record URL:
  • https://doi.org/10.3141/1665-10
• Summary URL:
  • http://scholar.google.com/scholar_lookup?title=EFFECTS+OF+ACCESS+CONTROL+ON+SAFETY+ON+URBAN+ARTERIAL+STREETS&author=H.+Brown&author=A.+Tarko&publication_year=1999
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0309070651
• Supplemental Notes:
  • This paper appears in Transportation Research Record No. 1665, Statistical Methods in Transportation and Safety Data Analysis for Highway Geometry, Design, and Operations.
• Corporate Authors:

  Transportation Research Board

  500 Fifth Street, NW
  Washington, DC  United States  20001
• Authors:
  • Brown, H C
  • Tarko, A P
• Publication Date: 1999

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 68-74
• Serial:
  • Transportation Research Record
  • Issue Number: 1665
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Arterial highways; Data collection; Fatalities; Highway safety; Injuries; Mathematical models; Mathematical prediction; Physical access control; Regression analysis; Traffic crashes; Urban highways
• Uncontrolled Terms: Property damage
• Subject Areas: Data and Information Technology; Design; Highways; Planning and Forecasting; Safety and Human Factors; I21: Planning of Transport Infrastructure; I82: Accidents and Transport Infrastructure;

Filing Info

• Accession Number: 00771214
• Record Type: Publication
• ISBN: 0309070651
• Files: TRIS, TRB, ATRI
• Created Date: Oct 22 1999 12:00AM