The Experts below are selected from a list of 6870 Experts worldwide ranked by ideXlab platform
Yu-ting Song - One of the best experts on this subject based on the ideXlab platform.
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Theoretical Research on Longitudinal Profile Design of Superhighways
Journal of Advanced Transportation, 2020Co-Authors: Yu-ting Song, Yu-long Pei, Bin Ran, Jia KangAbstract:To improve driving safety on Superhighways, longitudinal profile design parameters of a Superhighway are calculated via force analysis while a car is driven on a slope. The calculations consider characteristics of drivers, cars, and roads. According to the vehicle type, design speed, and natural conditions, the maximum longitudinal slope of a Superhighway is calculated and compared with those of an ordinary Superhighway and high-speed railway. Based on analysis of the vehicle climbing performance, braking performance, and driver visual characteristics, the maximum and minimum slope lengths of a Superhighway are calculated. By analyzing the elements of vertical curves, the minimum radius and minimum length of the vertical curves of a Superhighway are calculated by considering factors such as mitigating the impact at the slope bottom, driving at night, and driving time along vertical curves. Analysis and calculation results show that when the maximum longitudinal slope is 2.50%, 2.25%, and 2.00%, the minimum slope length is 450 m, 400 m, and 350 m, respectively, and the minimum vertical curve length is 145 m, 130 m, and 115 m, respectively, and the Superhighway travel requirements can be satisfied at speeds of 180 km/h, 160 km/h, and 140 km/h, respectively.
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Horizontal Alignment Security Design Theory and Application of Superhighways
Sustainability, 2020Co-Authors: Yu-long Pei, Bin Ran, Jia Kang, Yu-ting SongAbstract:In China, the maximum design speed of highways is 120 km/h, which first appeared in the Highway Engineering Technical Standard (Trial) in 1951. However, vehicle performance, road design, and construction technology have been greatly improved over the past 68 years. To adapt to the development demands of highway design speeds above 120 km/h in the future, it is urgent to study Superhighway alignment design theory. Therefore, the horizontal alignment security design theory of Superhighways was developed in this paper. First, the definition, classification, and construction mode of a Superhighway and suitable vehicles of different grades are presented. Then, the lengths of straight lines were limited to reduce driving fatigue. Next, the minimum radii of circular curves were calculated based on driver characteristics and stress analysis of operating vehicles. Finally, the minimum lengths of transition curves were calculated based on the centrifugal acceleration of the operating vehicles, the travel time, and the passenger visual characteristics. The calculation and analysis results show that the Superhighway linear features conform to the vehicle operating characteristics, and can ensure the safety of driving.
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Superhighway virtual track system based on intelligent road buttons
IEEE Access, 2020Co-Authors: Yu-long Pei, Bin Ran, Jia Kang, Yu-ting SongAbstract:To improve the safety of Superhighways, a virtual track system for Superhighways based on intelligent road buttons is studied by means of a structural analysis and mathematical model. The system consists of a road subsystem, onboard subsystem and service center subsystem. When a vehicle equipped with an onboard subsystem nears the road buttons, they activate the virtual track system, and the reader reads location coordinates and road alignment information at that point from the label buttons. At the same time, the data processing module begins to function. First, the module reads the linear parameters and processes them to obtain the angle between the road tangent and vehicle body. Then, the module reads the angle of the front wheels, the vehicle speed and the distance between the adjacent two label buttons. Finally, the module obtains the rotational speed of the steering wheel while the vehicle is driving between two label buttons by using the computational model and sends the control parameters to the steering motor. The research results show that when the design speed of the Superhighway is 140 km/h, 160 km/h and 180 km/h and the distances between the road buttons are less than 1.33 m, 1.50 m and 1.69 m, respectively, the distance between the centerline of the road and the vehicle can be restricted to less than 50 cm. Therefore, the virtual track system based on intelligent road buttons can restrict vehicles to travel in the virtual track and ensure the safety of Superhighways.
Yu-long Pei - One of the best experts on this subject based on the ideXlab platform.
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Theoretical Research on Longitudinal Profile Design of Superhighways
Journal of Advanced Transportation, 2020Co-Authors: Yu-ting Song, Yu-long Pei, Bin Ran, Jia KangAbstract:To improve driving safety on Superhighways, longitudinal profile design parameters of a Superhighway are calculated via force analysis while a car is driven on a slope. The calculations consider characteristics of drivers, cars, and roads. According to the vehicle type, design speed, and natural conditions, the maximum longitudinal slope of a Superhighway is calculated and compared with those of an ordinary Superhighway and high-speed railway. Based on analysis of the vehicle climbing performance, braking performance, and driver visual characteristics, the maximum and minimum slope lengths of a Superhighway are calculated. By analyzing the elements of vertical curves, the minimum radius and minimum length of the vertical curves of a Superhighway are calculated by considering factors such as mitigating the impact at the slope bottom, driving at night, and driving time along vertical curves. Analysis and calculation results show that when the maximum longitudinal slope is 2.50%, 2.25%, and 2.00%, the minimum slope length is 450 m, 400 m, and 350 m, respectively, and the minimum vertical curve length is 145 m, 130 m, and 115 m, respectively, and the Superhighway travel requirements can be satisfied at speeds of 180 km/h, 160 km/h, and 140 km/h, respectively.
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Horizontal Alignment Security Design Theory and Application of Superhighways
Sustainability, 2020Co-Authors: Yu-long Pei, Bin Ran, Jia Kang, Yu-ting SongAbstract:In China, the maximum design speed of highways is 120 km/h, which first appeared in the Highway Engineering Technical Standard (Trial) in 1951. However, vehicle performance, road design, and construction technology have been greatly improved over the past 68 years. To adapt to the development demands of highway design speeds above 120 km/h in the future, it is urgent to study Superhighway alignment design theory. Therefore, the horizontal alignment security design theory of Superhighways was developed in this paper. First, the definition, classification, and construction mode of a Superhighway and suitable vehicles of different grades are presented. Then, the lengths of straight lines were limited to reduce driving fatigue. Next, the minimum radii of circular curves were calculated based on driver characteristics and stress analysis of operating vehicles. Finally, the minimum lengths of transition curves were calculated based on the centrifugal acceleration of the operating vehicles, the travel time, and the passenger visual characteristics. The calculation and analysis results show that the Superhighway linear features conform to the vehicle operating characteristics, and can ensure the safety of driving.
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Superhighway virtual track system based on intelligent road buttons
IEEE Access, 2020Co-Authors: Yu-long Pei, Bin Ran, Jia Kang, Yu-ting SongAbstract:To improve the safety of Superhighways, a virtual track system for Superhighways based on intelligent road buttons is studied by means of a structural analysis and mathematical model. The system consists of a road subsystem, onboard subsystem and service center subsystem. When a vehicle equipped with an onboard subsystem nears the road buttons, they activate the virtual track system, and the reader reads location coordinates and road alignment information at that point from the label buttons. At the same time, the data processing module begins to function. First, the module reads the linear parameters and processes them to obtain the angle between the road tangent and vehicle body. Then, the module reads the angle of the front wheels, the vehicle speed and the distance between the adjacent two label buttons. Finally, the module obtains the rotational speed of the steering wheel while the vehicle is driving between two label buttons by using the computational model and sends the control parameters to the steering motor. The research results show that when the design speed of the Superhighway is 140 km/h, 160 km/h and 180 km/h and the distances between the road buttons are less than 1.33 m, 1.50 m and 1.69 m, respectively, the distance between the centerline of the road and the vehicle can be restricted to less than 50 cm. Therefore, the virtual track system based on intelligent road buttons can restrict vehicles to travel in the virtual track and ensure the safety of Superhighways.
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Economic Evaluation of Superhighway Based on Travel Cost
2018Co-Authors: Yu-long PeiAbstract:In order to evaluate the economy of Superhighway, on the basis of the analysis of the cost of the ordinary expressway and high speed railway, the cost of Superhighway is estimated. On this basis, the standard of the toll of Superhighway at all levels is determined by reference to the standard of the construction cost and the toll collection standard of the ordinary expressway. According to the toll collection standard of Superhighway and the fuel consumption cost of Superhighway at all levels, the cost of single car and the single person cost of Superhighway are calculated. Based on the analysis of highway passenger transport, railway passenger transport and civil aviation ticket price, the single person cost per kilometer of the above travel modes is calculated and compared with the single person travel cost per kilometer of Superhighway. The results show that the single person cost of Superhighway is between 0.29 and 0.47 yuan /km, which is 0.28 yuan /km higher than the highway bus, 0.18 yuan /km higher than the ordinary expressway self driving and 0.23 yuan /km higher than the express train, but 0.78 yuan/km lower than that of the first class seat of high-speed train, and is 0.92 yuan/km far lower than that of civil aviation flight economy class and 2.42 yuan/km lower than the business class. Therefore, the Superhighway trip has certain advantages in economy.
Bin Ran - One of the best experts on this subject based on the ideXlab platform.
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Theoretical Research on Longitudinal Profile Design of Superhighways
Journal of Advanced Transportation, 2020Co-Authors: Yu-ting Song, Yu-long Pei, Bin Ran, Jia KangAbstract:To improve driving safety on Superhighways, longitudinal profile design parameters of a Superhighway are calculated via force analysis while a car is driven on a slope. The calculations consider characteristics of drivers, cars, and roads. According to the vehicle type, design speed, and natural conditions, the maximum longitudinal slope of a Superhighway is calculated and compared with those of an ordinary Superhighway and high-speed railway. Based on analysis of the vehicle climbing performance, braking performance, and driver visual characteristics, the maximum and minimum slope lengths of a Superhighway are calculated. By analyzing the elements of vertical curves, the minimum radius and minimum length of the vertical curves of a Superhighway are calculated by considering factors such as mitigating the impact at the slope bottom, driving at night, and driving time along vertical curves. Analysis and calculation results show that when the maximum longitudinal slope is 2.50%, 2.25%, and 2.00%, the minimum slope length is 450 m, 400 m, and 350 m, respectively, and the minimum vertical curve length is 145 m, 130 m, and 115 m, respectively, and the Superhighway travel requirements can be satisfied at speeds of 180 km/h, 160 km/h, and 140 km/h, respectively.
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Horizontal Alignment Security Design Theory and Application of Superhighways
Sustainability, 2020Co-Authors: Yu-long Pei, Bin Ran, Jia Kang, Yu-ting SongAbstract:In China, the maximum design speed of highways is 120 km/h, which first appeared in the Highway Engineering Technical Standard (Trial) in 1951. However, vehicle performance, road design, and construction technology have been greatly improved over the past 68 years. To adapt to the development demands of highway design speeds above 120 km/h in the future, it is urgent to study Superhighway alignment design theory. Therefore, the horizontal alignment security design theory of Superhighways was developed in this paper. First, the definition, classification, and construction mode of a Superhighway and suitable vehicles of different grades are presented. Then, the lengths of straight lines were limited to reduce driving fatigue. Next, the minimum radii of circular curves were calculated based on driver characteristics and stress analysis of operating vehicles. Finally, the minimum lengths of transition curves were calculated based on the centrifugal acceleration of the operating vehicles, the travel time, and the passenger visual characteristics. The calculation and analysis results show that the Superhighway linear features conform to the vehicle operating characteristics, and can ensure the safety of driving.
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Superhighway virtual track system based on intelligent road buttons
IEEE Access, 2020Co-Authors: Yu-long Pei, Bin Ran, Jia Kang, Yu-ting SongAbstract:To improve the safety of Superhighways, a virtual track system for Superhighways based on intelligent road buttons is studied by means of a structural analysis and mathematical model. The system consists of a road subsystem, onboard subsystem and service center subsystem. When a vehicle equipped with an onboard subsystem nears the road buttons, they activate the virtual track system, and the reader reads location coordinates and road alignment information at that point from the label buttons. At the same time, the data processing module begins to function. First, the module reads the linear parameters and processes them to obtain the angle between the road tangent and vehicle body. Then, the module reads the angle of the front wheels, the vehicle speed and the distance between the adjacent two label buttons. Finally, the module obtains the rotational speed of the steering wheel while the vehicle is driving between two label buttons by using the computational model and sends the control parameters to the steering motor. The research results show that when the design speed of the Superhighway is 140 km/h, 160 km/h and 180 km/h and the distances between the road buttons are less than 1.33 m, 1.50 m and 1.69 m, respectively, the distance between the centerline of the road and the vehicle can be restricted to less than 50 cm. Therefore, the virtual track system based on intelligent road buttons can restrict vehicles to travel in the virtual track and ensure the safety of Superhighways.
Jia Kang - One of the best experts on this subject based on the ideXlab platform.
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Theoretical Research on Longitudinal Profile Design of Superhighways
Journal of Advanced Transportation, 2020Co-Authors: Yu-ting Song, Yu-long Pei, Bin Ran, Jia KangAbstract:To improve driving safety on Superhighways, longitudinal profile design parameters of a Superhighway are calculated via force analysis while a car is driven on a slope. The calculations consider characteristics of drivers, cars, and roads. According to the vehicle type, design speed, and natural conditions, the maximum longitudinal slope of a Superhighway is calculated and compared with those of an ordinary Superhighway and high-speed railway. Based on analysis of the vehicle climbing performance, braking performance, and driver visual characteristics, the maximum and minimum slope lengths of a Superhighway are calculated. By analyzing the elements of vertical curves, the minimum radius and minimum length of the vertical curves of a Superhighway are calculated by considering factors such as mitigating the impact at the slope bottom, driving at night, and driving time along vertical curves. Analysis and calculation results show that when the maximum longitudinal slope is 2.50%, 2.25%, and 2.00%, the minimum slope length is 450 m, 400 m, and 350 m, respectively, and the minimum vertical curve length is 145 m, 130 m, and 115 m, respectively, and the Superhighway travel requirements can be satisfied at speeds of 180 km/h, 160 km/h, and 140 km/h, respectively.
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Horizontal Alignment Security Design Theory and Application of Superhighways
Sustainability, 2020Co-Authors: Yu-long Pei, Bin Ran, Jia Kang, Yu-ting SongAbstract:In China, the maximum design speed of highways is 120 km/h, which first appeared in the Highway Engineering Technical Standard (Trial) in 1951. However, vehicle performance, road design, and construction technology have been greatly improved over the past 68 years. To adapt to the development demands of highway design speeds above 120 km/h in the future, it is urgent to study Superhighway alignment design theory. Therefore, the horizontal alignment security design theory of Superhighways was developed in this paper. First, the definition, classification, and construction mode of a Superhighway and suitable vehicles of different grades are presented. Then, the lengths of straight lines were limited to reduce driving fatigue. Next, the minimum radii of circular curves were calculated based on driver characteristics and stress analysis of operating vehicles. Finally, the minimum lengths of transition curves were calculated based on the centrifugal acceleration of the operating vehicles, the travel time, and the passenger visual characteristics. The calculation and analysis results show that the Superhighway linear features conform to the vehicle operating characteristics, and can ensure the safety of driving.
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Superhighway virtual track system based on intelligent road buttons
IEEE Access, 2020Co-Authors: Yu-long Pei, Bin Ran, Jia Kang, Yu-ting SongAbstract:To improve the safety of Superhighways, a virtual track system for Superhighways based on intelligent road buttons is studied by means of a structural analysis and mathematical model. The system consists of a road subsystem, onboard subsystem and service center subsystem. When a vehicle equipped with an onboard subsystem nears the road buttons, they activate the virtual track system, and the reader reads location coordinates and road alignment information at that point from the label buttons. At the same time, the data processing module begins to function. First, the module reads the linear parameters and processes them to obtain the angle between the road tangent and vehicle body. Then, the module reads the angle of the front wheels, the vehicle speed and the distance between the adjacent two label buttons. Finally, the module obtains the rotational speed of the steering wheel while the vehicle is driving between two label buttons by using the computational model and sends the control parameters to the steering motor. The research results show that when the design speed of the Superhighway is 140 km/h, 160 km/h and 180 km/h and the distances between the road buttons are less than 1.33 m, 1.50 m and 1.69 m, respectively, the distance between the centerline of the road and the vehicle can be restricted to less than 50 cm. Therefore, the virtual track system based on intelligent road buttons can restrict vehicles to travel in the virtual track and ensure the safety of Superhighways.
Amit Agarwal - One of the best experts on this subject based on the ideXlab platform.
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bicycle Superhighway an environmentally sustainable policy for urban transport
Transportation Research Part A-policy and Practice, 2020Co-Authors: Amit Agarwal, Dominik Ziemke, Kai NagelAbstract:Abstract Bicycle is a sustainable low-carbon transport mode. However, insufficient or unplanned infrastructure leads to decrease in the share of bicycle in many cities of developing nations. In order to increase the bicycle share and to provide safer, faster and more direct routes, a bicycle Superhighway is proposed for urban areas. This study identifies the potential of increase in the bicycle share. For maximum utilization of the new infrastructure, an algorithm is presented to identify the optimum number and locations of the connectors between proposed new infrastructure and existing network. Household income levels are incorporated into the decision making process of individual travellers for a better understanding of the modal shift. A real-world case study of Patna, India is chosen to show the application of the proposed Superhighway. It is shown that for Patna, the bicycle share can escalate as high as 48% up from 32% by providing this kind of infrastructure. However, together with bicycles, allowing motorbikes on the Superhighway limits the bicycle share to 44%. The increase in bicycle share is mainly a result of people switching from motorbike, public transport and walk to the bicycle. Further, to evaluate the benefits of the bicycle Superhighway, this study first extends an emission modelling tool to estimate the time-dependent, vehicle-specific emissions under mixed traffic conditions. Allowing only bicyclists on the Superhighway improves congested urban areas, reduces emissions, and increases accessibility. However, allowing motorbikes on the Superhighway increases emissions significantly in the central part of the urban area and reduces accessibilities by bicycle mode to education facilities which are undesirable. This study elicits that a physically segregated high-quality bicycle Superhighway will not only attract current non-cyclist travellers and increase the share of the bicycle mode, but will also reduce negative transport externalities significantly.