scholarly journals The Method of Dynamic Identification of the Maximum Speed Limit of Expressway Based on Electronic Toll Collection Data

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Fumin Zou ◽  
Feng Guo ◽  
Junshan Tian ◽  
Sijie Luo ◽  
Xiang Yu ◽  
...  
Keyword(s):  
Dynamic Change ◽  
Vector Model ◽  
Maximum Speed ◽  
Speed Limit ◽  
Data Set ◽  
Electronic Toll Collection ◽  
The Road ◽  
Road Section ◽  
Toll Collection ◽  
Information Recognition

To overcome the drawbacks of the maximum speed limit information of expressways (i.e., long update cycle and great complexity of information recognition), in this work, an Electronic Toll Collection (ETC) gantry data-based method for dynamically identifying the maximum speed limit information of expressways is proposed. Firstly, the characteristics of the ETC gantry data are analyzed, and then data are cleaned and reconstructed, after which an algorithm is proposed for constructing a vehicle travel speed data set. Secondly, the speed feature vector model of the road section is established by taking the relationship among the speed distribution feature, time domain feature, and the maximum speed limit of the road section into consideration. Then, a data supplement algorithm is constructed to solve the problem of the imbalance of data samples. Finally, the combined GC-XGBoost classification algorithm is used to train and learn the potential speed limit features, and it is verified through the Fujian Provincial Expressway ETC data and the speed limit information provided by the Fujian Traffic Police. The result shows that the accuracy of the method in the recognition of the maximum limited speed information of the expressway is 97.5%. Compared with the traditional limited speed information recognition and extraction methods, the proposed approach can identify the maximum limited speed information of each section of the expressway more efficiently. It can also accurately identify the dynamic change of the maximum limited speed information, which is able to provide data support for intelligent expressway management systems and map providers.

scholarly journals DESIGN, SIMULATION AND MATHEMATICAL MODELLING OF THE DYNAMIC BEHAVIOR OF A VEHICLE TIRE AND CHASSIS SYSTEM AT A TURN.

2020 ◽  
Vol 7 (1) ◽  
pp. 12-23
Author(s):  
Mbelle Samuel Bisong ◽  
Paune Felix ◽  
Lokoue D. Romaric Brandon ◽  
Pierre Kisito Talla
Keyword(s):  
Road Construction ◽  
Maximum Speed ◽  
Safety Measures ◽  
The Road ◽  
Road Users ◽  
Road Section ◽  
Lateral Behavior ◽  
Road Characteristics ◽  
Fundamental Theorems ◽  
The Given

Road security has become with time a topic of concern in our society as per the increasing number of accidents and deaths occurring on the highways. Regulatory experts on road users have constantly been working for ways to solve this problem and thence better the lives of the citizens. This paper is aimed at proposing a mathematical model integrating specific parameters, describing the dynamic lateral behavior of a vehicle’s tire and chassis systems and enabling to state a relationship between road characteristics and vehicle dynamics. To achieve this, we made used of the fundamental theorems of dynamics for the modeling of the vehicle’s suspended and non-suspended masses and load transfers, then we associated this with the Pacejka Tire model to obtain a complete vehicle model. After the particularization of a global model, a simulator was realized named “DYNAUTO SIMULATOR” which iterates the given variables to produce a consistent result. After an experimental research made on the Ndokoti – PK 24 road section we could, thanks to our simulator determine the maximum speed to have at every turn of this road section and also understand the effect of the modification of a vehicle’s center of gravity on its stability. This work will be an important tool which can be recommended to the regulatory board as a major asset in the road construction policy and also in the improvement of road safety measures.

scholarly journals A Speed Based Congestion Study of a Road Section Connecting Fulbarigate-Dakbangla, Khulna

2018 ◽  
Vol 8 (6) ◽  
Author(s):  
Palash Chandra Das ◽  
Neeti Zaman Bintee ◽  
A. K. Azad
Keyword(s):  
Travel Speed ◽  
Data Set ◽  
The Road ◽  
Gps Survey ◽  
Road Section ◽  
Road Capacity ◽  
Third World Country ◽  
Parking Spot ◽  
The City ◽  
Mlr Model

Congestion, a problem that is not new for a third world country like Bangladesh. Like the other megacities of Bangladesh, Khulna is gradually experiencing this phenomenon in an acute manner. Khulna-Jessore highway that runs through the city and gives it a linear form works as the backbone of the traffic skeleton of Khulna city. This study focuses on developing a speed based model for predicting congestion scenario of Khulna city. Fulbarigate to Dakbangla midblock is chosen as the study corridor. The whole study corridor (10.73km) is divided into two equal halves and travelled 10 times with the stream and against the stream to generate 20 data set. Speedometer GPS survey along with moving observed method is used to collect necessary data. A latitude longitude based speed profile is found at each travel based on which travel speed index (TSI) is calculated and a multiple linear regression (MLR) model for predicting congestion is developed. Independent variables are selected based on the possibility of affecting congestion of the road section. The MLR model is found as TSI = 0.0167083 + 0.0001826*Volume (PCU/hr.) + 0.0019625*Speed Drop Factor, with 8.86 % error. Congestion is found severe at Doulatpur Bazar and Shibbari to Dakbangla circle within the study corridor. Due to illegal parking spot, road capacity is not utilizing properly. As a result in peak hour, speed drops more than average peak hour speed and congestion occurs.

scholarly journals Estimation of Optimal Speed Limits for Urban Roads Using Traffic Information Big Data

2021 ◽  
Vol 11 (12) ◽  
pp. 5710
Author(s):  
Hyungkyu Kim ◽  
Doyoung Jung
Keyword(s):  
Traffic Safety ◽  
Safety Information ◽  
Traffic Information ◽  
Maximum Speed ◽  
Speed Limit ◽  
Speed Limits ◽  
The Road ◽  
Optimal Speed ◽  
Road Users ◽  
Adjustment Factors

The use of an inconsistent speed limit determination method can cause low speed limit compliance. Therefore, we developed an objective methodology based on engineering judgment considering the traffic accident rate in road sections, the degree of roadside development, and the geometric characteristics of road sections in urban roads. The scope of this study is one-way roads with two or more lanes in cities, and appropriate sections were selected among all roads in Seoul. These roads have speed limits of the statutory maximum speed of 80 km/h or lower and are characterized by various speeds according to the function of the road, the roadside development, and traffic conditions. The optimal speed limits of urban roads were estimated by applying the characteristics of variables as adjustment factors based on the statutory maximum speed limit. As a result of investigating and testing various influence variables, the function of roads, the existence of median, the level of curbside parking, the number of roadside access points, and the number of traffic breaks were selected as optional variables that influence the operating speed. The speed limit of one-way roads with two or more lanes in Seoul was approximately 10 km/h lower than the current speed limit. The existing speed limits of the roads were applied uniformly considering only the functional road class. However, considering the road environment, the speed limit should be applied differently for each road. In the future, if the collection scope and real-time collection of road environment information can be determined, the GIS visualization of traffic safety information will be possible for all road sections and the safety of road users can be ensured.

Information fusion based interference solution in electronic toll collection system

2013 ◽  
Vol 32 (9) ◽  
pp. 2660-2663
Author(s):  
Liang WANG ◽  
Hua-xiang LU ◽  
Wei-ping JING ◽  
Tian-xiang CHEN
Keyword(s):  
Information Fusion ◽  
Collection System ◽  
Electronic Toll Collection ◽  
Toll Collection

A Road Section near Guy's Hill, Jamaica

1942 ◽  
Vol 79 (4) ◽  
pp. 241-252 ◽  
Author(s):  
C. A. Matley ◽  
Frank Raw
Keyword(s):  
Sedimentary Rocks ◽  
Plutonic Rock ◽  
Igneous Rocks ◽  
The Road ◽  
Road Section ◽  
Igneous Intrusions ◽  
Microscope Slides

The rocks exposed along the road between Linstead and Guy's Hill, Jamaica, were described by Dr. C. T. Trechmann in this magazine in 1936 (pp. 259–260). The chief object of his account was to prove that the igneous rocks there were intrusions later than the associated Cretaceous and Tertiary limestones, which, according to him, had been metamorphosed into hornfelses, some of which, he stated later (1937, p. 561), he knew to have an “igneous” appearance under the microscope, “which tends to support my contention that in Jamaica we have sedimentaries altered in situ into rocks that would ordinarily be classified as igneous.” Dissent from his descriptions and interpretations was expressed by C. A. M. (Matley, 1937, pp. 501–3), the criticisms being mainly based on an examination of Trechmann's own microscope slides by F. R. A visit to Jamaica by C. A. M. in 1939 allowed him to study this road and to collect a suite of rocks for petrological examination. The results show that Trechmann's interpretation cannot be sustained. There is no granodiorite or other plutonic rock present, no metamorphism hornfelsing the sedimentary rocks, and no igneous intrusions into the Tertiary limestones.

Assessment of roadability and stability of a vehicle movement on the bend

2020 ◽  
Keyword(s):  
Mathematical Model ◽  
Road Surface ◽  
Inertia Force ◽  
Speed Limit ◽  
The Road ◽  
Inertial Moment ◽  
The Mathematical Model ◽  
Computer Imitation ◽  
Vehicle Movement

The paper presents the mathematical model and the technique of computer imitation of a vehicle movement on bend. Research of roadability and stability of the truck and the schedules illustrating change of characteristics of the steered movement have been obtained. The critical modes of the movement causing separation of wheels from road surface and side slippage have been defined. Speed limit of the steered movement on trajectory of the set curvature have been determined. Keywords vehicle, wheel, cross and longitudinal reactions of the road, inertia force, inertial moment, trajectory of a vehicle movement, angles of withdrawal of wheels, spring weight angle of heel, side slippage, vehicle drift

ANALYSIS OF LANDSLIDE PROCESSES ON THE ROADS OF KHAKASSIA BEFORE THE BRIDGES OVER THE YENISEI RIVER FROM THE PERSPECTIVE OF ALL STAGES OF THE LIFE CYCLE OF STRUCTURES

2020 ◽  
Author(s):  
Олег Закирович Халимов
Keyword(s):  
Life Cycle ◽  
Design Stage ◽  
Yenisei River ◽  
The Road ◽  
Road Section ◽  
Hydrogeological Conditions ◽  
First Case ◽  
Landslide Processes ◽  
The Yenisei River ◽  
Hydrogeological Studies

В статье проанализированы трудности в процессе строительства автомобильной дороги от Братского моста через Енисей в сторону Абакана, связанные с отсутствием учета на стадии проектирования осложнившихся гидрогеологических условий, влияющих на опускание моста и дороги. Оползневые процессы, созданные искусственно при сооружении выемки дна автомобильной дороги от Братского моста более 40 лет развиваются на участке дороги Абакан-Подсинее перед железным и автодорожным мостом через Енисей. Как и в первом случае на стадии проектирования не выполнены гидро-геологические исследования. The article analyzes the difficulties in the process of construction of the highway from the Bratsk bridge over the Yenisei river to Abakan, associated with not taking into account the complicated hydrogeological conditions at the design stage, associated with the lowering of the bridge and road. Landslide processes created artificially during the construction of the dredging of the road bottom from the Bratsk bridge have been developing for more than 40 years on the Abakan-Podsinee road section in front of the railway and road bridge over the Yenisei. As in the first case, hydrogeological studies were not performed at the design stage.

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