scholarly journals Evaluation Model for the Level of Service of Shared-Use Paths Based on Traffic Conflicts

2020 ◽  
Vol 12 (18) ◽  
pp. 7578
Author(s):  
Wei Wang ◽  
Zhentian Sun ◽  
Liya Wang ◽  
Shanshan Yu ◽  
Jun Chen
Keyword(s):  
Service Quality ◽  
Traffic Management ◽  
Evaluation Model ◽  
Analytical Framework ◽  
Service Level ◽  
Motor Vehicles ◽  
Service Levels ◽  
The Road ◽  
Traffic Conflicts ◽  
Traffic Conflict

As a product of urban motorized traffic, sharing roads between pedestrians and non-motor vehicles has been widely used in the world. In order to improve the service quality of slow traffic, it is necessary to evaluate the service level of the shared-use path to determine whether the road is suitable for setting up shared forms. Therefore, the purpose of this study is to provide an analytical framework to quantify and accurately express the service level of shared-use paths. Considering the direct impact of traffic conflicts on service quality, fuzzy clustering analysis is used to analyze traffic conflicts. Then, the corresponding relationship between traffic conflict events and service levels is established, and the classification criteria of the service levels at all levels and the corresponding range of conflict events are determined. By judging the interval in which the number of conflict events belongs, we can determine the service level of the shared-use path, and then determine whether the slow-moving road is suitable for sharing between pedestrians and non-motor vehicles. The research results can provide a reference for traffic management departments to determine the service level and applicability of shared roads.

scholarly journals Airlines Entry and Exit and the Impact on Air Traffic Management: An Analytical Framework for Zero-Sum and Positive-Sum Outcomes

2010 ◽  
Author(s):  
Tom Berry ◽  
Dipasis Bhadra ◽  
Jennifer Gentry ◽  
Gregory Nelson
Keyword(s):  
Traffic Management ◽  
Low Cost ◽  
Analytical Framework ◽  
Air Traffic Management ◽  
Air Traffic ◽  
New Markets ◽  
Service Levels ◽  
Low Cost Carriers ◽  
Zero Sum ◽  
The Impact

Passenger airline service can have a significant impact on a metropolitan region's economy in terms of direct spending and employment, as well as on indirect spending related to industries such as tourism and the service sector. In the past decade passenger service levels have changed considerably in many markets because of a wide variety of events including increased competition, terrorism, and a downturn in the economy. Airlines have responded to these challenges in a variety of ways. Some of the traditional network carriers have been forced into bankruptcy in an attempt to reduce costs and compete more effectively with low cost carriers. In contrast, the low cost carriers have expanded service and entered new markets at a rapid pace.This paper examines the economic evolutionary process whereby a dominant carrier competes intensely in one market against a similar airline and retreats in another where new, lower-cost entrant expands service. Literature is examined for evidence pertaining to the market's response to a network carrier's financial distress, its impact on airport service levels, and implications for local economies. A zero sum case is explained using a recent example. A positive sum case is explored, where the positive contributions of the entering carrier exceed those left behind by the resident carrier. In the process, depending on the types of gains and nature of the evolving airlines' network, the patterns of air traffic may also change. Using these experiences, an analytical framework is proposed that attempts to explain the emergent behavior of low cost carriers when they enter new markets. In addition, the impact of these changes on the air traffic management system is also examined.

Stereo Vision for Bus Traffic Conflict Investigation

2013 ◽  
Vol 392 ◽  
pp. 799-802
Author(s):  
S. Battiato ◽  
S. Cafiso ◽  
A. di Graziano ◽  
G.M. Farinella ◽  
O. Giudice
Keyword(s):  
Stereo Vision ◽  
Traffic Control ◽  
Imaging System ◽  
Real Data ◽  
Urban Context ◽  
The Road ◽  
Traffic Conflicts ◽  
Traffic Conflict ◽  
Control Devices ◽  
Road Characteristics

In this paper an imaging system for bus traffic conflict investigation is presented. The system employs geo-referenced stereo sequences and tracking procedure to provide much greater information regarding pre-crash and crash events than what is currently available. The exploitation of the traffic conflict technique potentiality as a surrogate safety measure could constitute an effective tool in understanding how the driver interacts and adapts its behavior with respect to the vehicle, the road characteristics, the traffic control devices and the environment. Experiments performed on real data acquired in urban context confirm the effectiveness of the system for the traffic conflicts measurement and the driver behavior analysis.

scholarly journals The problem of position determination of signal transmitting device in 3D road

2018 ◽  
Vol 1 (1) ◽  
Author(s):  
Chengdong Le ◽  
Liangchen Xu ◽  
Shiqing He
Keyword(s):  
Traffic Management ◽  
Motor Vehicle ◽  
Average Distance ◽  
Urban Traffic ◽  
Motor Vehicles ◽  
Sampling Point ◽  
Original Signal ◽  
The Road ◽  
Sampling Points ◽  
Collection Point

With the development of social economy, the current urban traffic problem is more prominent. In order to solve this problem very well, the idea of establishing intelligent traffic management came into being. The establishment of intelligent traffic management, cannot do without the signal launch and reception. Therefore, how to set up some wireless signal transmitting device in time to travel on the road motor vehicles to send traffic information and how to achieve full coverage of the signal and signal stability is our article to discuss the issue. For the first question, we must separate the motorway and non-motorway from all roads. Motorway lanes are usually straight and long. While the bends are usually just sidewalks or bike lanes (non-motorized lanes). So the 121 road can be clustered analysis, clustering of the two indicators for each road length (the distance between the adjacent points) and the collection point of density (by drawing, you can observe the more curved the denser the road collection point, so the road curvature into the collection point of the intensity), the result of clustering can get 48 motor lanes. And then through regress function regression and data fitting to achieve an approximate description of each type of motor vehicle description model, so that each road in a given latitude (latitude) coordinates to determine the latitude (longitude) coordinates and the corresponding altitude. For the problem of two, according to the meaning of the road to know the signal strength is only related to the distance between the sampling point and the launch device, so you can 'the motor vehicle between the signal reception is relatively close to' this indicator into ' The average of the distance between all the sampling points and the transmitting device is close to '. By reading the data will be latitude and longitude conversion distance length, so that the maximum value as small as possible. The position of the launcher can be obtained by programming by MATLAB. When considering the altitude, only the position of the transmitting device can be changed. (9.7824,56.7720), and the position coordinates when considering the altitude are D (9.7459, 56.7586, 73.5645), and the position coordinate of the signal device is B (9.7824, 56.7720). For question three, note the effect of the original signal device A on the result. We still use the average of the distance between all the sampling points of the road and the launcher to characterize the stability of the signal reception. The average distance of all non-motorized trains to the original signal device A is first determined, and then the average distance of all non-motorized lanes from the new signal device B is set, and the signal acceptance strength of the non-motorized lane can be used to characterize. And then use the same method in question two to determine the location of the new signal transmitter. Finally, the coordinates of the position of the new signal device are E (9.7459,56.7586,73.5645).

scholarly journals Performance Analysis of Signaled Intersections to Improve Safety in Depok Intersection, Depok City

2019 ◽  
Author(s):  
Sony Widyawan ◽  
Darul Prayogo ◽  
Rukman . ◽  
Diajeng Ayu D P ◽  
Abdul Rokhim
Keyword(s):  
Traffic Congestion ◽  
Good Condition ◽  
Phase 3 ◽  
Service Levels ◽  
The Third ◽  
Third Phase ◽  
Three Phase ◽  
Traffic Conflicts ◽  
Traffic Conflict ◽  
Selection Of

Transportation problems are one of the issues faced in Depok, especially at intersections. The problems of traffic congestion and conflict often occur at intersections, especially at Depok intersection in which one of the efforts made to reduce the conflicts is made by managing the intersection. The method used in analyzing intersection performance is the use of calculations at IHCM, while the analysis of traffic conflicts to determine the seriousness of traffic conflicts is to use traffic conflict techniques (TCT) compared to the conflicts. Recommendations are made with a scheme using the selection of 3 phases and 3.5 phases then making a comparison with the third phase and choosing the most appropriate scenario. From the recommendation scheme made using the VISSIM 10 PTV software, the most appropriate scheme is obtained by using three-phase settings. The results of phase 3 simulations are effective in reducing the number of traffic conflicts and service levels are still in good condition.

Closing Service Quality Gaps Using Dynamic Service Level Agreements

2016 ◽  
Vol 7 (2) ◽  
pp. 48-71
Author(s):  
Carlos Mendes ◽  
Miguel Mira da Silva
Keyword(s):  
Service Quality ◽  
Execution Time ◽  
Services Quality ◽  
Service Level ◽  
Service Level Agreements ◽  
Service Levels ◽  
Five Dimensions ◽  
Time Dynamic ◽  
Design Time ◽  
Quality Approach

Each service interaction between a provider and a customer is an opportunity for the provider to delight, satisfy or disappoint the customer. However, the customers' expectations may change on every interaction. Therefore, defining Service Level Agreements (SLAs) at design time and then restricting the customers' options limits the possibilities for the customers to express their expectations. This is one of the reasons why the services quality is suffering from gaps identified more than two decades ago. In this paper, the authors propose a service quality approach such that SLAs can be specified at execution time (dynamic service levels) in contrast to the usual static SLAs specified at design time. They evaluated the proposal's impact in the service quality gaps using SERVQUAL. The proposal showed improvements in three of the five dimensions measured by SERVQUAL.

scholarly journals Mikrosimulasi Kinerja Simpang Bersinyal Dengan Menggunakan Software Surrogate Safety Assessment Model (SSAM) di Kota Malang (Studi Kasus: Simpang Terusan Sulfat)

2020 ◽  
Vol 14 (2) ◽  
pp. 120-128
Author(s):  
Pipit Rusmandani ◽  
◽  
Enrico Pria Anggana ◽  
Agus Sasmito ◽  
◽  
...  
Keyword(s):  
Data Analysis ◽  
Experimental Research ◽  
Safety Assessment ◽  
Service Level ◽  
Assessment Model ◽  
Lane Change ◽  
The Road ◽  
Traffic Conflict

Safety, speed, and capacity should be taken into account for designing intersection (AASHTO, 2001). Therefore, it is necessary to know the conflicts at the intersection. This experimental research aims (1) to find out the performance of Malang Sulfate Canal intersection, (2) to know the conflicts in it, and (3) to find the best recommendation. MKJI, PTV Vissim 10, and Surrogate Safety Assessment (SSAM) were used for data analysis. The result shows that the delay value at the peak hour was 54.4 seconds with an E service level category. The conflicts at the highest peak hours were 2782 conflicts (2035 crossing conflicts and 747 lane-change conflicts). At the end, widening the road reduced the number of traffic conflict by 26% and the delay value by 2%.

scholarly journals Analisis Kinerja Simpang Bersinyal Untuk Meningkatkan Keselamatan Pada Simpang Depok Kota Depok

2019 ◽  
Vol 6 (1) ◽  
pp. 1-16
Author(s):  
Sony Widyawan ◽  
Rukman Rukman
Keyword(s):  
Traffic Congestion ◽  
Good Condition ◽  
Conflict Analysis ◽  
Phase 3 ◽  
Service Levels ◽  
The Third ◽  
Third Phase ◽  
Traffic Conflicts ◽  
Traffic Conflict

The problemof transportation isone of the problems faced in Depok, especially atintersections. Problems of traffic congestion and conflicts often occur at signalizedintersections, especially at the intersection of four signalized Depok Depok City where one ofthe efforts made to reduce conflicts in Depok intersection is done by setting the intersection.The methods used in the analysis of the performance of the intersection is the use ofcalculation on IHCM, while the traffic conflict analysis to determine the level of seriousnessof traffic conflicts is by using traffic conflict Technique (TCT) is compared to that conflictVisSim 10. Recommendation is done by using a scheme using a 3-phase elections and 3.5phase and then make a comparison with the third phase (existing) and selected the mostappropriate scenario. From the scheme of recommendations that were made by using thesoftware PTV VISSIM 10 obtained the most appropriate scheme that uses three-phasearrangement. The results of the simulation phase 3 was effective at reducing the number oftraffic conflicts and service levels are still in good condition

scholarly journals Impacts of Snowy Weather Conditions on Expressway Traffic Flow Characteristics

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Jiancheng Weng ◽  
Lili Liu ◽  
Jian Rong
Keyword(s):  
Traffic Flow ◽  
Traffic Management ◽  
Control Strategies ◽  
Flow Characteristics ◽  
Weather Conditions ◽  
Service Levels ◽  
The Road ◽  
Adverse Weather ◽  
Snow Conditions ◽  
The Impact

Snowy weather will significantly degrade expressway operations, reduce service levels, and increase driving difficulty. Furthermore, the impact of snow varies in different types of roads, diverse cities, and snow densities due to different driving behavior. Traffic flow parameters are essential to decide what should be appropriate for weather-related traffic management and control strategies. This paper takes Beijing as a case study and analyzes traffic flow data collected by detectors in expressways. By comparing the performance of traffic flow under normal and snowy weather conditions, this paper quantitatively describes the impact of adverse weather on expressway volume and average speeds. Results indicate that average speeds on the Beijing expressway under heavy snow conditions decrease by 10–20 km/h when compared to those under normal weather conditions, the vehicle headway generally increases by 2–4 seconds, and the road capacity drops by about 33%. This paper also develops a specific expressway traffic parameter reduction model which proposes reduction coefficients of expressway volumes and speeds under various snow density conditions in Beijing. The conclusions paper provide effective foundational parameters for urban expressway controls and traffic management under snow conditions.

scholarly journals EVALUASI KINERJA RUAS JALAN KI HAJAR DEWANTARA KOTA TERNATE

2018 ◽  
Vol 1 (1) ◽  
Author(s):  
Ilyas B Ibrahim ◽  
Chairul Anwar ◽  
Muhammad Taufiq Yudha Saputra
Keyword(s):  
Traffic Management ◽  
Service Level ◽  
Flow Speed ◽  
Degree Of Saturation ◽  
The Road ◽  
Road Capacity ◽  
Traffic Performance ◽  
Traffic Systems ◽  
On The Road ◽  
High Level

The position of Ki Hadjar Dewantara road is strategic location, where as an education center, office and residential center are often happened to increase in vehicle volume, especially during peak hour, consequently, this condition makes congestion on this road. There are ideas for road widening, moved side barriers and one.way traffic management, which are purposing to know traffic performance currently and generating a recommendation of traffic systems. By observations on traffic surveys were carried out on the road at 06.00 to 18.00 WIT. Traffic performance analysis is based on the 1997 Indonesia Road Capacity Manual (MKJI). The results of the Ki Hajar Dewantara road analysis showed a high level of side resistance with a value of degree of saturation (DS) in segment 1, which was 0.78, free flow speed of 31.2 km / hour, road capacity of 1953 pcu / hour. Furthermore, as an alternative solution the application of a one way system on the road section that showed a better performance with DS = 0.32 for west to east and DS = 0.22 east to west with a service level B category with stable current, speed slightly limited by traffic, the driver has enough freedom to choose a speed. The design for implementing this one-way system is good for solving problems.

A fuzzy evaluation method of road vehicle automatic weighing instrument in dynamic force metrological performance

2020 ◽  
Vol 64 (1-4) ◽  
pp. 1365-1372
Author(s):  
Xiaohui Mao ◽  
Liping Fei ◽  
Xianping Shang ◽  
Jie Chen ◽  
Zhihao Zhao
Keyword(s):  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Evaluation Model ◽  
Dynamic Performance ◽  
Dynamic Force ◽  
Fuzzy Evaluation ◽  
Road Vehicle ◽  
Evaluation Standard ◽  
The Road ◽  
Metrological Performance

The measurement performance of road vehicle automatic weighing instrument installed on highways is directly related to the safety of roads and bridges. The fuzzy number indicates that the uncertain quantization problem has obvious advantages. By analyzing the factors affecting the metrological performance of the road vehicle automatic weighing instrument, combined with the fuzzy mathematics theory, the weight evaluation model of the dynamic performance evaluation of the road vehicle automatic weighing instrument is proposed. The factors of measurement performance are summarized and calculated, and the comprehensive evaluation standard of the metering performance of the weighing equipment is obtained, so as to realize the quantifiable analysis and evaluation of the metering performance of the dynamic road vehicle automatic weighing instrument in use, and provide data reference for adopting a more scientific measurement supervision method.

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