Background: Distracted walking is a major cause of pedestrian fatalities. Along with the expansion and popularity of mobile phones, their impacts on pedestrian safety, especially when crossing urban intersections have attracted a lot of attention. The purpose of this study is to evaluate the effects of mobile-phone use on pedestrians’ crossing behavior when passing signalized intersections. Ma...

Development of disaggregate models for estimating different property damage collision type frequencies in urban intersections has rarely been studied, particularly in Iran. It seems very little research work being implemented for studying the effect factors on collision type frequency at intersections. The main objective of this paper is to develop suitable statistical models to predict types o...

delay is one of the principal measures of performance used to determine the level of service (los) at signalized intersections and several methods have been widely used to estimate vehicular delay. very few studies only have been carried out to estimate delay at signalized intersections under mixed traffic conditions prevailing in developing countries like india. in the present study, various p...

Roundabout is one of the most effective intersection control methods in the world. Although, they have often been used in Iran, but, the methods which are proposed to analyze roundabouts are very old and new regulations are not implemented for analyzing modern roundabouts. There are strong needs to apply new modern analyzing methods for studying roundabouts in Iran. Also, these methods should b...

A system of signalized intersections is a critical element in the smooth operation of both arterial and urban street facilities. The amount of vehicular and pedestrian traffic which can be processed by a system of intersections depend on a) characteristics of the traffic and pedestrian stream, b) traffic control measures, c) various physical and operating characteristics of the roadway and d) t...

In this study, the generalized estimating equations with the negative binomial link function were used to model rear-end crash frequencies at signalized intersections to account for the temporal or spatial correlation among the data. The longitudinal data for 208 signalized intersections over 3 years and the spatially correlated data for 476 signalized intersections which are located along diff...

1 2 Transportation planning has been playing a critical role in shaping the economic health and 3 quality of life. It not only provides insight into the mobility of people and goods, but also 4 influences patterns of growth and economic activity. Metropolitan transportation planning is a 5 challenging transportation topic due to the lack of future traffic information, such as evaluation 6 of th...

This paper reports the status and preliminary results of an ongoing study investigating the safety benefit of signalizing intersections of high-speed (50 mph and greater) divided expressways. Before and after analysis was conducted and compared to empirical Bayesian (EB) techniques. A safety performance function was developed using negative binomial regression for a control group of 67 non-sign...

in length and width than their actual size. The perceived larger vehicle size can also result in various occlusion scenarios (5–7). Occlusion of a detector can result in increased detector occupancy and false detections when no vehicles actually exist at the detector location. Occlusion of a following vehicle can also result in missing detections. Several studies have been conducted regarding v...

Right turn on red (RTOR) is permitted at signalized intersection in the United States. Adequate intersection sight distances should be provided to ensure that the RTOR drivers turn into receiving lanes safely and efficiently. However, in practice it is not unusual to find signalized intersections with restricted right-turn sight distances, at which RTOR is still permitted. This research is focu...