00771214

Component

https://doi.org/10.3141/1665-10

http://scholar.google.com...arko&publication_year=1999

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.

This paper appears in Transportation Research Record No. 1665, Statistical Methods in Transportation and Safety Data Analysis for Highway Geometry, Design, and Operations.

English

p. 68-74

1999

Transportation Research Record

0309070651

Figures (5) ; References (9) ; Tables (5)

Access control (Transportation); Arterial highways; Data collection; Fatalities; Highway safety; Injuries; Mathematical models; Mathematical prediction; Regression analysis; Traffic crashes; Urban highways

Property damage

Data and Information Technology; Design; Highways; Planning and Forecasting; Safety and Human Factors; I21: Planning of Transport Infrastructure; I82: Accidents and Transport Infrastructure

TRIS, TRB, ATRI

Oct 22 1999 12:00AM

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• FATAL CRASH RATES IN THE SOUTHEASTERN UNITED STATES: WHY ARE THEY HIGHER?
• INCOMPLETE ACCIDENT REPORTING: META-ANALYSIS OF STUDIES MADE IN 13 COUNTRIES
• INCORPORATING GEOGRAPHIC CORRELATION WHEN SAMPLING A TRANSPORTATION NETWORK
• INJURY SEVERITY AND DURATION OF HOSPITAL STAY FOR URBAN ROAD ACCIDENTS IN RIYADH
• INJURY, FATAL, AND PROPERTY DAMAGE ACCIDENT MODELS FOR HIGHWAY CORRIDORS
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• OVERVIEW OF THREE EXPERT SYSTEMS FOR CRASH DATA COLLECTION
• RATES OF OCCUPANT DEATHS IN VEHICLE ROLLOVER: IMPORTANCE OF FATALITY-RISK FACTORS
• SAFETY AND THE CHOICE OF DEGREE OF CURVE
• SAFETY EFFECTS OF THE CONVERSION OF RURAL TWO-LANE TO FOUR-LANE ROADWAYS BASED ON CROSS-SECTIONAL MODELS
• SAFETY EVALUATION OF ROLLED-IN CONTINUOUS SHOULDER RUMBLE STRIPS INSTALLED ON FREEWAYS
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