Impact on Road Safety and Operation of Rerouting Traffic in Rural Travel Time Information System

Abstract

The Travel Time Information System (TTIS) is an Intelligent Traffic Control System installed in Poland. As is common, travel time is the only factor in the decision about rerouting traffic, while a route recommendation may consider multiple criteria, including road safety. The aim of the paper is to analyze the safety level of the entire road network when traffic is rerouted on paths with different road categories, intersection types, road environments, and densities of access points. Furthermore, a comparison between traffic operation and road safety performance was carried out, considering travel time and delay, and we predicted the number of crashes for each possible route. The results of the present study allow for maximizing safety or traffic operation characteristics, providing an effective tool in the management of the rural road system. The paper provides a methodology that can be transferred to other TTISs for real-time management of the road network.

Exploring Regional Reduction Pathways for Human Exposure to Fine Particulate Matter (PM2.5) Using a Traffic Assignment Model

“…Accounting for exposure reductions and link iF values in the future design of networks could help limit exposure greatly. Furthermore, exposure-based routing may have implications beyond PM 2.5 exposure such as noise, , driver and pedestrian safety, , and roadway infrastructure − impacts, especially if vehicles (more so HDVs) are routed to roadways with low iF s that may not be equipped to handle high-traffic volumes. The development of multicriteria objective functions that account for impacts beyond exposure and travel time and can be integrated into these types of modeling frameworks is essential.…”

Safety Effects of Connected and Automated Vehicle-Based Variable Speed Limit Control near Freeway Bottlenecks considering Driver’s Heterogeneity

“…Equation ( 4) considers the abovementioned heterogeneities from both noncompliance and overcompliance. Furthermore, considering the difference of imprecise speed perception of human drivers, we set the upper limit of noncompliance and overcompliance rate for drivers in simulation experiments, which confines the fluctuation of individual heterogeneity to a certain range from 0% to the preset upper limit with the uniform distribution, as shown in equations ( 5)- (6). NC uplimit and OC uplimit means the upper limit of NC rate and OC rate , respectively.…”

“…e speed of vehicles downstream reduces when approaching the bottleneck area and a shockwave is propagated to the upstream, which increases rear-end collision risks of upstream vehicles. In order to mitigate the rear-end collision risks caused by freeway bottlenecks, various safety management countermeasures have been implemented in practice, such as variable speed limit (VSL) control, ramp metering, managed lanes dynamic routing, and hard shoulder running [2,[4][5][6][7][8][9][10][11].…”

Intelligent Transportation Related Complex Systems and Sensors

“…Building upon an intelligent traffic control system installed in Poland, [ 4 ] addressed the issue of safety and traffic operation on roads by (i) analysing the safety level of the entire road network when traffic is rerouted to paths along different road categories, intersections, road environments, and densities of access points and (ii) presenting a comparison between traffic operation and road safety performance, with the aim of predicting the number of crashes for each possible route when considering travel time and delay. The results of the study allow for maximizing safety or traffic operation characteristics, providing an effective tool for the management of rural road systems.…”