Benchmarking regions using a heteroskedastic grouped random parameters model with heterogeneity in mean and variance: Applications to grade crossing safety …

S Heydari, L Fu, L Thakali, L Joseph - Analytic methods in accident …, 2018 - Elsevier
Comparing regions while adjusting for differences in characteristics of sites located in those
regions is valuable since it identifies possible inter-regional dissimilarities in crash risk …

[HTML][HTML] A novel Bayesian hierarchical model for road safety hotspot prediction

L Fawcett, N Thorpe, J Matthews, K Kremer - Accident Analysis & …, 2017 - Elsevier
In this paper, we propose a Bayesian hierarchical model for predicting accident counts in
future years at sites within a pool of potential road safety hotspots. The aim is to inform road …

Computational Bayesian statistics in transportation modeling: from road safety analysis to discrete choice

RA Daziano, L Miranda-Moreno, S Heydari - Transport reviews, 2013 - Taylor & Francis
In this paper, we review both the fundamentals and the expansion of computational
Bayesian econometrics and statistics applied to transportation modeling problems in road …

Speed limit reduction in urban areas: A before–after study using Bayesian generalized mixed linear models

S Heydari, LF Miranda-Moreno, F Liping - Accident Analysis & Prevention, 2014 - Elsevier
In fall 2009, a new speed limit of 40 km/h was introduced on local streets in Montreal
(previous speed limit: 50 km/h). This paper proposes a methodology to efficiently estimate …

Effects of globally obtained informative priors on Bayesian safety performance functions developed for Australian crash data

AP Afghari, MM Haque, S Washington… - Accident Analysis & …, 2019 - Elsevier
The precision and bias of Safety Performance Functions (SPFs) heavily rely on the data
upon which they are estimated. When local (spatially and temporally representative) data …

On the causal effect of proximity to school on pedestrian safety at signalized intersections: A heterogeneous endogenous econometric model

S Heydari, L Miranda-Moreno, AJ Hickford - Analytic methods in accident …, 2020 - Elsevier
Pedestrian safety in proximity to schools is a major concern of transportation authorities,
local governments, and residents. In fact, several countermeasures (eg, school-zone speed …

Hotspot identification for Shanghai expressways using the quantitative risk assessment method

C Chen, T Li, J Sun, F Chen - … of environmental research and public health, 2017 - mdpi.com
Hotspot identification (HSID) is the first and key step of the expressway safety management
process. This study presents a new HSID method using the quantitative risk assessment …

Bayesian methodology to estimate and update safety performance functions under limited data conditions: A sensitivity analysis

S Heydari, LF Miranda-Moreno, D Lord, L Fu - Accident Analysis & …, 2014 - Elsevier
In road safety studies, decision makers must often cope with limited data conditions. In such
circumstances, the maximum likelihood estimation (MLE), which relies on asymptotic theory …

Multilevel models to analyze before and after speed data

MT Islam, K El-Basyouny - Analytic methods in accident research, 2015 - Elsevier
Analyzing before–after speed data is often limited to a standard comparison of various
speed parameters. Although a few studies have used a model-based approach, various …

Development of crash modification factors for intersections in Toowoomba city

MN Al-Marafi, K Somasundaraswaran… - International Journal of …, 2021 - Taylor & Francis
This research outlines the analytical approaches that may be employed to recommend
multiple treatments for application to improve safety level at hazardous intersections in …