In recent years, several countries have started to introduce 2+1 roads in their road networks. Although some studies have recognized the great benefits of using 2+1 roads, few studies have investigated the effects of different design features of 2+1 roads on driver behavior and driving performance, including the type of median separation between opposing traffic flows. The overall aim of this driving simulator study is to determine whether different types of median separation on 2+1 roads affect driving behavior, and to provide new insights for designing more effective and safer 2+1 roads. To achieve this goal, a driving simulator study was carried out and forty-six participants took part in the experiments. The scenario exactly reproduced an existing two-lane rural road in Poland where 2+1 sections are implemented; four different median separation types were tested: 1) double-line markings only; 2) reflective elements; 3) flexible guideposts; 4) cable barriers. The effects of the different types of median separation on driving performance were statistically analyzed using data from 184 simulation tests. The results of the study suggest that the type of median separation significantly affects driving performance on 2+1 roads. While the driving speeds on the passing lane did not differ significantly between the four configurations of the median separation, the lateral position of the passing vehicle on the additional lane was found to be significantly influenced by the type of separation, with a greater distance from the median recorded when the cable barriers were implemented. This study shows the potentiality of using driving simulation to test different solutions for 2+1 roads and selecting the most effective alternative in terms of safety and operation. In addition, the results of this study can also be used to improve the behavioral models that can be implemented in the traffic micro-simulation of 2+1 road conditions.
Calvi, A., Damiano Cafiso, S., D’Agostino, C., Kieć, M., Petrucci, G. (2022). A Driving Simulator Study to Evaluate the Effects of Different Types of Median Separation on Driving Performance on 2+1 Roads. In Proceedings of 8th Road Safety and Simulation RSS2022.
A Driving Simulator Study to Evaluate the Effects of Different Types of Median Separation on Driving Performance on 2+1 Roads
Alessandro Calvi;
2022-01-01
Abstract
In recent years, several countries have started to introduce 2+1 roads in their road networks. Although some studies have recognized the great benefits of using 2+1 roads, few studies have investigated the effects of different design features of 2+1 roads on driver behavior and driving performance, including the type of median separation between opposing traffic flows. The overall aim of this driving simulator study is to determine whether different types of median separation on 2+1 roads affect driving behavior, and to provide new insights for designing more effective and safer 2+1 roads. To achieve this goal, a driving simulator study was carried out and forty-six participants took part in the experiments. The scenario exactly reproduced an existing two-lane rural road in Poland where 2+1 sections are implemented; four different median separation types were tested: 1) double-line markings only; 2) reflective elements; 3) flexible guideposts; 4) cable barriers. The effects of the different types of median separation on driving performance were statistically analyzed using data from 184 simulation tests. The results of the study suggest that the type of median separation significantly affects driving performance on 2+1 roads. While the driving speeds on the passing lane did not differ significantly between the four configurations of the median separation, the lateral position of the passing vehicle on the additional lane was found to be significantly influenced by the type of separation, with a greater distance from the median recorded when the cable barriers were implemented. This study shows the potentiality of using driving simulation to test different solutions for 2+1 roads and selecting the most effective alternative in terms of safety and operation. In addition, the results of this study can also be used to improve the behavioral models that can be implemented in the traffic micro-simulation of 2+1 road conditions.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
