Ordered fractional split approach for aggregate injury severity modeling
In crash frequency models, frequency by severity level is examined with multivariate count
models. In these multivariate approaches the impact of exogenous variables is quantified …
models. In these multivariate approaches the impact of exogenous variables is quantified …
Analysis of crash proportion by vehicle type at traffic analysis zone level: A mixed fractional split multinomial logit modeling approach with spatial effects
In traffic safety literature, crash frequency variables are analyzed using univariate count
models or multivariate count models. In this study, we propose an alternative approach to …
models or multivariate count models. In this study, we propose an alternative approach to …
Enhanced aggregate framework to model crash frequency by accommodating zero crashes by crash type
In recent years, joint count and fractional split model structure based approaches have
emerged as a credible alternative for multivariate crash frequency dependent variables …
emerged as a credible alternative for multivariate crash frequency dependent variables …
Highway safety assessment and improvement through crash prediction by injury severity and vehicle damage using Multivariate Poisson-Lognormal model and Joint …
Introduction: Predicting crash counts by severity plays a dominant role in identifying roadway
sites that experience overrepresented crashes, or an increase in the potential for crashes …
sites that experience overrepresented crashes, or an increase in the potential for crashes …
A joint econometric framework for modeling crash counts by severity
This paper proposes an innovative joint econometric framework for examining total crash
count and crash proportion by different crash severity. In our proposed approach …
count and crash proportion by different crash severity. In our proposed approach …
A new econometric approach for modeling several count variables: a case study of crash frequency analysis by crash type and severity
There is limited adoption of research modeling crash severity frequency considering
different crash types due to the challenge associated with analyzing large number of …
different crash types due to the challenge associated with analyzing large number of …
An integrated multi-resolution framework for jointly estimating crash type and crash severity
The current research effort contributes to safety literature by developing an integrated
framework that allows for the influence of independent variables from crash type and …
framework that allows for the influence of independent variables from crash type and …
An econometric framework for integrating aggregate and disaggregate level crash analysis
Traditionally, aggregate crash frequency by severity and disaggregate severity analysis
have been conducted independently in the safety literature. The current research effort …
have been conducted independently in the safety literature. The current research effort …
A joint econometric approach for modeling crash counts by collision type
In recent years, there is growing recognition that common unobserved factors that influence
crash frequency by one attribute level are also likely to influence crash frequency by other …
crash frequency by one attribute level are also likely to influence crash frequency by other …
Combined latent class and partial proportional odds model approach to exploring the heterogeneities in truck-involved severities at cross and T-intersections
Although the fatal rate of passenger vehicle-involved crashes has decreased in the United
States, the fatal rate of truck-involved crashes has increased. This has, in recent years …
States, the fatal rate of truck-involved crashes has increased. This has, in recent years …