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This study aimed to investigate red-light violations and their influencing factors at traffic signals in four major cities in Jordan. Field data was collected from 30 traffic signals in Amman, Zarqa, Jerash and Irbid cities. The intersection type, leg grade and speed of the subject's approach data was collected through field surveys and measurements, while the red-light violation data was collected from the recorded videos. The study analysis showed that among 3,444 drivers who had the chance to violate a red light, 436 (12.66%) drivers ran a red light. Pickup drivers had the highest violation rate among all drivers, with a rate of 21.4%, while heavy-vehicle drivers showed the lowest percentage of violation, at 11.18% for buses and 8.24% for trucks. The analysis showed that four-leg intersections had a higher violation rate than three-leg intersections. Also, drivers tended to show more violations on upgrade intersection approaches, with almost the same violation behavior on level and downgrade intersection approaches. According to traffic movement type, the analysis results showed that through-moving vehicles had the highest violation rate among all movement types, followed by left-turners, while the lowest violation rate was observed among U-turn movements. Referring to the location of the intersection, the violation rate was 13.48% in urban areas and 11.37% in sub-urban areas. The results showed that drivers tend to violate red lights more during fall than in spring. It was found that about 21% of drivers who arrived at the intersection at the beginning of red time violated the red light, while only 3.53% violated the red light during the rest of the red time interval. In addition, the percentage of red-light violations was directly proportional to the subject approach speed and total traffic volume entering the intersection and was inversely proportional to the conflicting traffic volumes. [ABSTRACT FROM AUTHOR]

The article focuses on research aimed at developing an empirical delay model for nonintersection median U-turns on suburban divided multilane highways. Potential operational and safety benefits of using the unsignalized traffic movements at median U-turns include improvements in the level of service of their intersections, reduction in travel time and potential reduction in crashes.

This paper includes a simulation-based analysis of non-stop traffic at isolated signalised intersections. A Min-Max traffic control method is proposed to replace conventional traffic signals and maintain a continuous traffic flow. The method applicability is tested by means of Discrete Event Simulation (DES) using AutoMod software package. A set of quantitative Measures of Performance (MOP) is used to demonstrate the benefits of the proposed method compared to conventional traffic signals. In addition to eliminating vehicles stoppages, simulation results of the proposed method showed improvement in the overall traffic flow by reducing vehicle average travel time, average delay time, and the average number of vehicles at the intersection. The proposed method can be adapted to suit other types of traffic intersections and flow patterns and conditions. [ABSTRACT FROM AUTHOR]