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A Heckman selection model for the safety analysis of signalized intersections
- Source :
- PLoS ONE, Vol 12, Iss 7, p e0181544 (2017), PLoS ONE
- Publication Year :
- 2017
-
Abstract
- Purpose: The objective of this paper is to provide a new method for estimating crash rate and severity simultaneously. Methods: This study explores a Heckman selection model of the crash rate and severity simultaneously at different levels and a two-step procedure is used to investigate the crash rate and severity levels. The first step uses a probit regression model to determine the sample selection process, and the second step develops a multiple regression model to simultaneously evaluate the crash rate and severity for slight injury/kill or serious injury (KSI), respectively. The model uses 555 observations from 262 signalized intersections in the Hong Kong metropolitan area, integrated with information on the traffic flow, geometric road design, road environment, traffic control and any crashes that occurred during two years. Results: The results of the proposed two-step Heckman selection model illustrate the necessity of different crash rates for different crash severity levels. Conclusions: A comparison with the existing approaches suggests that the Heckman selection model offers an efficient and convenient alternative method for evaluating the safety performance at signalized intersections. Published version
- Subjects :
- Crash severity
Computer science
Normal Distribution
lcsh:Medicine
Transportation
Crash
Urban Environments
Mathematical and Statistical Techniques
Probit model
Statistics
Medicine and Health Sciences
Public and Occupational Health
lcsh:Science
050107 human factors
Multidisciplinary
05 social sciences
Accidents, Traffic
Transportation Infrastructure
Traffic flow
Terrestrial Environments
Physical Sciences
Engineering and Technology
Hong Kong
Heckman correction
Safety
Statistics (Mathematics)
Research Article
Sample selection
Automobile Driving
Markov Models
Highways
Research and Analysis Methods
Markov model
Civil Engineering
Normal distribution
0502 economics and business
Linear regression
Humans
0501 psychology and cognitive sciences
Heckman Selection Model
Statistical Methods
050210 logistics & transportation
Models, Statistical
Ecology and Environmental Sciences
lcsh:R
Traffic Safety
Probability Theory
Probability Distribution
Roads
Multivariate Analysis
Environment Design
lcsh:Q
human activities
Mathematics
Forecasting
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- PLoS ONE, Vol 12, Iss 7, p e0181544 (2017), PLoS ONE
- Accession number :
- edsair.doi.dedup.....46309224bcc46eff8b88a77a31544cfb