Urban transportation systems and traffic management
A. Rasaizadi; A. Ardestani; S.E. Seyedabrishami
Abstract
BACKGROUND AND OBJECTIVES: One of the short-term strategies to manage the traffic and make a balance between travel supply and demand for the near future is the short-term prediction of traffic parameters and informing the passengers. Therefore passengers are more likely to avoid traveling during traffic ...
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BACKGROUND AND OBJECTIVES: One of the short-term strategies to manage the traffic and make a balance between travel supply and demand for the near future is the short-term prediction of traffic parameters and informing the passengers. Therefore passengers are more likely to avoid traveling during traffic peak hours. In this study, hourly average traffic speed and hourly traffic volume as two traffic parameters that indicate traffic state are predicted for Karaj-Chaloos road in Iran. METHODS: Since traffic data have large volume, machine learning-based models have more suitable performance than traditional models. However, it is not merely possible to discover the cause and effect relationships and the importance of features. In this study, after using the artificial neural network and K-nearest neighbor models to predict traffic parameters, to analyze the sensitivity of the results, the importance of used features is investigated. Also, the effect of passing the time over the accuracy of predictions has been examined. FINDINGS: According to the results, the highest accuracy of predicting hourly traffic volume and hourly average traffic speed is achieved by the K-nearest neighbor that is equal to 61% and 91%, respectively. CONCLUSION: Compared to the historical average as a benchmark model, a significant improvement in the accuracy of predictions has been obtained by the artificial neural network and K-nearest neighbor models.
Urban transportation systems and traffic management
S.O. Olorunfemi; A.O. Adeniran
Abstract
BACKGROUND AND OBJECTIVES: The significance of road mobility in any nation cannot be far-fetched or beyond economic purpose, spatial interaction and social integration. It contributes enormously to the livelihood of human existence most especially by facilitating regional complementarity of trade, intervening ...
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BACKGROUND AND OBJECTIVES: The significance of road mobility in any nation cannot be far-fetched or beyond economic purpose, spatial interaction and social integration. It contributes enormously to the livelihood of human existence most especially by facilitating regional complementarity of trade, intervening opportunities, and spatial transferability. The objective of this study was to examine the influence of road transport quality on urban dwellers’ satisfaction in Kogi state, Nigeria. METHODS: The study adopted a survey research design and systematic sampling method to elucidate primary data through questionnaire from 1215 respondents. FINDING: It was revealed that the status of the road network has an influence on the transport rate charge per trip at a correlation value of 0.998 and significant value of 0.000; and on the comfort derived from the passengers at correlation value of 0.545 and significant value of 0.000. The provision of transport scheme has an influence on the transport rate charge per trip at the correlation value of 0.905 and significant value of 0.000; and on the quality of road transport comfort at a correlation value of 0.523 and significant value of 0.000. The timely response of road maintenance and sub road infrastructure maintenance has an influence on the transport rate charge per trip at a correlation value of 0.545 and significant value of 0.000; and on the quality of road transport comfort at correlation value of 0.912 and significant value of 0.000. The communication link between the agencies in charge of road transport and the people in the study area influences the compliance of road transport operators with road safety rules and regulations at a correlation value of 0.565 and significant value of 0.000. CONCLUSION: The condition of the vehicle has a great impact on the level of comfort.
Urban transportation systems and traffic management
A. Rasaizadi; M. Askari
Abstract
The modal split model is one of the steps of the classical four-step travel demand planning. Predictive, descriptive, and prescriptive modal split models are essential to make a balance between travel demand and supply. To calibrate these models, it is necessary to detect and employ influential independent ...
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The modal split model is one of the steps of the classical four-step travel demand planning. Predictive, descriptive, and prescriptive modal split models are essential to make a balance between travel demand and supply. To calibrate these models, it is necessary to detect and employ influential independent variables that are related to characteristics of travel modes, individual and family attributes, zones land use, etc. In previous studies, researchers used the household size, the number of children, and the number of employees as independent variables to show the role of family structure on the modal split. These variables cannot discriminate between different families with different structures. This paper uses the life cycle concept to categorize families based on their structures, and the effectiveness of these new variables on modal split models is examined. For this purpose, five types of family structures are considered that differences between them are based on the age of the family’s children. The Multinomial Logit model is used for mode choice modeling for different trip aims. The mode choice model has been calibrated using the origin-destination data of Qazvin-Iran. Results show the critical role of life cycle dummies in the mode choice models compared to household size, for work, educational, personal, and social- recreational trip aims. Life cycle variables are more active on the work trips mode choice model by estimating 14 significant coefficients, in a 90 percent level of significance. The number of life cycle significant coefficients is decreased to 3 for the shopping trips model.
Urban transportation systems and traffic management
R. Ramezanian Bozorg Ghasem Abadi; A. Mohammadi; F. Moattar
Abstract
Traffic is one of the main sources of air pollution in metropolitan areas. With development of transportation system, inappropriate vehicle production, and the use of low-quality fuels, increased pollution in these areas is inevitable. The current study tries to determine PM2.5, PM10, NO2, and CO emission ...
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Traffic is one of the main sources of air pollution in metropolitan areas. With development of transportation system, inappropriate vehicle production, and the use of low-quality fuels, increased pollution in these areas is inevitable. The current study tries to determine PM2.5, PM10, NO2, and CO emission dispersion, caused by traffic, using CALINE4 software. According to research findings, during one month in each of 3 different seasons, CO levels varied between 30-55ppm. Also, NO2 levels, at all stations in Tehran, varied between 0.1- 0.4ppm; values above 0.05 represent pollution by diesel-fueled vehicles, mostly old and outdated public transportation buses. Modeling of suspended particles smaller than 2.5 microns indicated that pollution at all of the 10 stations was between 65-113μg/m3, which was above standard (35μg/m3). In addition, during all the studied months, the amount PM10 varied between 105-193μg/m3, and in some areas, it was above the Standard of the Iranian Department of the Environment (DOE) of 150μg/m3. According to matrix of internal and external factors analysis, strategies to be considered are of Weakness/Opportunity type (benefiting from opportunities and overcoming existing weaknesses). By forming a Quantitative Strategic Planning Matrix (QSPM), W/O strategies of SWOT matrix were prioritized. As a result, increased budget for environmental control in the area (39.5), cooperation and coordination between the private and public sectors (69.4), equipping the public transportation with low-energy and green vehicles (48.4), widespread public awareness campaign (98.3), and transferring the polluting industries to suburban areas (78.3) were selected as top strategies for managing traffic-borne air pollutant in District 12 of Tehran.
Urban transportation systems and traffic management
A. Edrisi; N. Javanbakht; H. Ganjipour
Abstract
In this study, the manner of private taxis drivers has been investigated for choosing passenger and destination from a fixed point. Therefore, two models called Multinomial and Nested Logit Models have been utilized. The information gained by scrolling in 2016 is the input data, which are in the format ...
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In this study, the manner of private taxis drivers has been investigated for choosing passenger and destination from a fixed point. Therefore, two models called Multinomial and Nested Logit Models have been utilized. The information gained by scrolling in 2016 is the input data, which are in the format of revealed preference, acquired by the verbal interview in Vanak Square in Tehran (Iran). Based on data resulted by 120 questionnaires the selection modeling of passenger and destination was done. The results of the descriptive analysis show that 96.7% of respondents are men and only 3.3% are women. In addition, 15% of them are illiterate, 16.7% have under Diploma degree, 52.5% have Diploma degree and 15.8% have Bachelor degree or higher. On average, the verification was 44%, and the results achieved by this research show that the parameters consisting of searching time, the working time of drivers and the traveling time were the most important factors resulted from the calibration of the Logit models. Nested Logit model has a better performance compared with the Multinomial Logit model. The Nested Logit Model has ρ2=0.45 while this value is 0.35 for the Multinomial Logit Model. Finally, the suitable decision has been made in the various path based on gained results.
Urban transportation systems and traffic management
A.R. Sadeghi; N. Panahi; A.R. Ravaee
Abstract
Nowadays, the expansion of the cities is an inevitable necessity; increasing the dependence of the citizens on motor vehicles and, consequently, making development of the transportation networks a necessity rather than an option. Thus, increasing car ownership and car use has created many problems for ...
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Nowadays, the expansion of the cities is an inevitable necessity; increasing the dependence of the citizens on motor vehicles and, consequently, making development of the transportation networks a necessity rather than an option. Thus, increasing car ownership and car use has created many problems for the cities, such as increasing greenhouse gas emissions, environmental pollution, casualties of accidents and reducing pedestrian safety. For instance, since 1970, CO2 emissions have increased by about 90%, with emissions from fossil fuel combustion and industrial processes contributing about 78% of the total greenhouse gas emissions increase from 1970 to 2011.Thus, in this study, complete street policy is proposed as a tool to solve these problems. This policy has many benefits including reducing transportation costs, increasing travel options, increasing safety, reducing air pollution and improving the quality of life for people. In this research, Jomhuri Street in Shiraz city has been analyzed according to complete street criteria by using SWOT and Space Syntax method. Finally, some strategies including using ramps for the disabled pedestrian, maintaining the continuity of the sidewalks, using techniques to decrease the width of the street and considering suitable furniture along the street are proposed to make Jomhuri Street a complete street. Therefore, in the process of formulating the appropriate strategies and policies for this Street, the attempt is to improve sustainable urban development through the creation of safe spaces to facilitate the movement of all users in the street.
Urban transportation systems and traffic management
A. Edrisi; H. Ganjipour
Abstract
Nowadays Information and Communication Technology effects on all aspects of human activities, such as teleworking, electronic commerce, electronic banking, electronic learning, etc. the most of these services can prevent unnecessary travels in cities especially in rush hour. The aim of this study is ...
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Nowadays Information and Communication Technology effects on all aspects of human activities, such as teleworking, electronic commerce, electronic banking, electronic learning, etc. the most of these services can prevent unnecessary travels in cities especially in rush hour. The aim of this study is to explore the frequency of electronic shopping and in-store shopping in Tehran, according to gender, educational background and employment status in order to obtain some information about the behavior of online and traditional shoppers in Tehran. For this purpose, 510 questionnaires were collected and the shoppers were categorized and analyzed in some groups, using SPSS23. The findings showed that the people often tend to buy their favorable products traditionally. As expected, the percentage of people that never experience electronic shopping is high but the development of online shops and mobile apps can attract people to this way of modern shopping. A good strategy for improving online marketing will reduce traffic congestion, travel time, energy consumption, and air pollution and so on.
Urban transportation systems and traffic management
A. Chan; A. Ng
Abstract
There has been an increasing concern about inactive drivers who would easily lead to road accidents and fatalities once return to driving. This study investigated the re-usability of traffic signs for inactive drivers with consideration of driver factors and cognitive sign features. Fifty-seven Hong ...
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There has been an increasing concern about inactive drivers who would easily lead to road accidents and fatalities once return to driving. This study investigated the re-usability of traffic signs for inactive drivers with consideration of driver factors and cognitive sign features. Fifty-seven Hong Kong Chinese, who possessed a full driving license but had not driven for an extended period, comprehended the meanings and rated the cognitive features of 21 traffic signs. The re-usability performance of participants who had not driven for at least a year was similar to those who had not been driving since obtaining driving license. The re-usability of traffic signs was better when the signs were familiar, concrete, simple and meaningful. To improve sign re-usability, designers should consider the cognitive sign features, provide direct and unambiguous visualization for underlying concepts, make better use of eye-catching design elements, and proper juxtaposition of similar pictorials in sign design.
Urban transportation systems and traffic management
F. Salehi; A.R. Karbassi; M. Khashaypoor
Abstract
Bus rapid transit is an innovative, high capacity, lower cost public transit solution in metropolitan cities. Idea is to dedicate lanes for quick and efficient transport of passengers to their destinations. In the present investigation the environmental impact assessment of bus rapid transit in ...
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Bus rapid transit is an innovative, high capacity, lower cost public transit solution in metropolitan cities. Idea is to dedicate lanes for quick and efficient transport of passengers to their destinations. In the present investigation the environmental impact assessment of bus rapid transit in Tehran metropolitan city is brought out. For this purpose bus rapid transit Lane No. 10 is investigated. The bus rapid transit Lane No.10 is about 10 km in distance that moves up and down between Azadi and Simon Bolivar Squares. About 77500 passengers using 50 buses are transited per day in lane No. 10. These 50 buses cover a distance of 9600 km/day. The results of present study showed that about 6.5 million liters of fuel is saved annually. It should be pointed out that environmental costs are also reduced for about US$ 1.7 million/yr. The overall score of environmental impact assessment stands at +10 that is indicative of Lane No. 10 compatibility with the environmental considerations.