فصلنامه راهور
پیاپی 37 (بهار 1396)

In general, freeways, due to geometric conditions, the speed and number of overpass lines, pass a large percentage of traffic flow volume. Lane change phenomenon can decreases their functional capacity and as a result, the travel time increased traffic flow and reduces speed and safety. Line change is divided into two types of optional and mandatory line change. Mandatory lane change (MLC) occurs when a driver must change lane to follow a specified path and Discretionary lane change (DLC) occurs when a driver changes to a lane perceived to offer better traffic conditions, he attempts to achieve desired speed, avoid following trucks, avoid merging traffic, etc. The aim of this research is predicting the number of the Discretionary lane change in freeways with count regression models.

The information used in this study has been processed by the data of an interstate freeway in America. Then, using this data, two types of linear regression models, poisson regression has been paid and then, for a good evaluation of the models are presented their observation and estimation charts. One of the most important usage of this model is its use in macroscopic simulation software and use in service-level design models.

The virtual variables of the number of crossing line, the number of vehicles on the current crossing line and then the average speed of the current crossing line and the target crossing line have the most impact on the estimation of this model.

In the comparison between the two linear regression and count regression models, it was observed that The count regression model describes this phenomenon better because of the proximity of the characteristics to the line change feature. It is also suggested that in future research should also be considered the mandatory line change and the differences between the two models.

Pathology research of educational process to certification in driving schools of Karaj was done with the aim of recognizing pathology and recognizing issues related to the educational process (practical and theoretical) to certification in driving schools. Given the importance of training and classical and purposeful training in driving and the importance of driving schools that played an important role in certification after the 1970s, it seems that with the pathology in this field can be eliminated the existing vacuums.

The researcher used a descriptive, survey method to analyze the research. The statistical population is also referrals and students of driving schools in Karaj city. Therefore, the size of this society was obtained from the first 6 months of 1394, which is 25421 people, which of course is used to calculate the sample size using the Cochran formula. So, for calculating sample size, the Cochran formula was used. Finally, 231 people were calculated and samples were selected through stratified Probabilistic sampling method. The data gathering tool was a researcher-made questionnaire that was confirmed its validity and reliability before its implementation.

The results of the research, while confirming the findings of other similar studies, show that, apart from the educational planning variable, other variables are effective in the study of the vulnerability of education process to students in driving schools which Of course, according to beta coefficients, the damages related to practical training – damages related to the location and the schools equipment and damages related to the academic ability of teachers in education is more than other independent variables.

Traffic police can minimize these problems by holding in-service courses and educational classes as well as unmanageable control of educational managers through central cameras. Also, adequate supervision is provided on the training of driving Instructors by the managers of the schools and other officers of the traffic police, and in the event of a violation, the coaches will be introduced to the legal basis.

Today, besides human, financial, and economic capital, other factors in organizations and societies are described as "organizational factors" that can affect the performance of the organization, on the other hand, the advancement of culture and technology has led to improvements in employee performance.

The present research in terms of aim is practical and in terms of method is descriptive-survey with correlation approach. The statistical population of this research included all the police staff of mentioned province, which consists of 84 members selected randomly. In this research, the standard questionnaire was used. Cronbach's alpha was used to measure reliability. Data analysis was performed using regression test.

The extent of organizational structure impact on the performance of the traffic police personnel of West Azarbaijan is equal to 0.707 and also, The extent of organizational culture impact on the performance of the traffic police personnel of west Azarbaijan is equal to 0.511 and Finally, The extent of organizational technology impact on the performance of the traffic police personnel of west Azarbaijan is equal to 0/403.

The findings of this research show that the organizational factors and the variables studied have been effective in improving the performance of the personnel of the traffic police

Driving psychometric scale is designed to measure amount of anxiety and aggressive behaviors while driving with cars. The purpose of this study was done with the aim to investigate the psychometric properties of this scale as a tool for measuring the amount of anxiety and aggressive behaviors of drivers.

The statistical population of this study was all taxi drivers in Tehran, 300 of which were selected as sample in accessible manner. The research instrument consisted of the Psychology Scale of Driving, the Psychological Disorders Symptom Checklist (SCL-90), and the rate of driving violations in the sample group in the last three months. To evaluate the psychometric properties were determined to content validity, criterion validity, construct validity as well as reliability.

Content validity was obtained and approved by five experts by an agreement coefficient of 0.62. Regarding criterion validity, the correlation between the scores of the subscales with the rate of violations of the last three months was 0.39 and 0.42 and with subscales scores of SCL-90 were obtained 0.48 and 0.53, which were significant at the level of 0.01. In the exploratory factor analysis, the questions were loaded on two factors and confirmed the confirmatory factor analysis of this two-factor model. The internal consistency between questions, factors and the whole scale was appropriate.

The results of the analysis of the multidimensional graded response model was indicated the fitting of the model to the data and the optimum value of the model parameters, which provided a high degree of awareness for the scale. This scale has good psychometric properties for the drivers of the city of Tehran and can be used to measure the amount of anxiety and aggressive behaviors during driving

By considering different variables that cause accidents, we can refer to unauthorized speed and driving offenses which are as one of the most important factors in accidents. There are relatively good studies around the world to model the relationship between different variables and the probability of accidents.. but so far, a few studies have been done on the impact of three independent variables (the number of traffic violations, transportations and unauthorized speed) on the number of accidents. Therefore,this study aims to predict the number of accidents according to the collected information in previous researches.

This research is a descriptive-analytical study, which was considered as the axis of study of Tabriz-Keshwin axis which is based on field research and documentation reviews. Based on the statistics of crashes on the freeway, the research hypotheses were analyzed using SPSS software. Considering that the collected data is small and the research is to investigate and determine the relationship between the variables, Pearson correlation coefficient has been used to measure the relationship. Also, with regard to the acceptance of the linear relationship between research variables, linear regression has been used to find the relation equation.

Information related to number of traffic violations, transportations were collecting and evaluating in consecutive years. After calculating it was realized that 31 percent of the dependent variables changes’ was related to independent variables mentioned above. Other changes were related to variables which were not considered in the study.

 It is suggested to be issued to reduce violations related to speed with the field of software launching for the issuance and distribution of a fine or online SMS for offenders who are unauthorized speed, so that violations and accidents will continue to decline.

Transportation is one of the main pillars of urban life that must be coordinated with its cultural and social factors and the combination of different types of transportation must meet the demand for urban transport. The absence of an effective urban transportation system has been a barrier to the economic growth of cities and there are many problems, such as traffic congestion, air pollution, increasing fuel consumption, vehicle depreciation, and so on. Considering these consequences and the importance of transportation as the dynamics and vitality of an urban set, determining appropriate strategies and policy making for the control and improvement of traffic parameters is of great important.

In this study, using the systems dynamics method has been defined a comprehensive and integrated model for an urban transportation system with emphasizes on public transportation. The model has been analyzed using behavior simulation in the software environment and using the data of Tehran.

The results of simulation of the model show that the simultaneous application of co-policies between public transportation and land use, the provision of electronic services and the improvement of the quality of public transport services can contribute to the improvement of the traffic problem and the resulting damage, including air pollution and resulting mortality .

In line with the policies introduced, the implementation of the system for providing electronic services in companies and organizations and training individuals on how to use it, as well as considering the maximum distance of 8 to 10 minutes walking from home to work to the public transportation center, reconstruction of infrastructure in order to achieve Proper transportation, along with the proper use of the street, the creation and provision of private ride facilities near metro stations and bus terminals are the most important ones that can be prioritized