scholarly journals Optimization of Work Zone Segments on Urban Roads Using Cellular Automata Model in Mixed Traffic

2018 ◽  
Vol 47 (1) ◽  
pp. 29-35
Author(s):  
Mohit Kumar Singh ◽  
Gaurav Pandey ◽  
K Ramachandra Rao
Keyword(s):  
Cellular Automata ◽  
Work Zone ◽  
Work Zones ◽  
Rational Form ◽  
Zone Length ◽  
Cellular Automata Model ◽  
The Road ◽  
Traffic Characteristics ◽  
On The Road ◽  
Using Data

Increased delays and reduced speeds in work zones leads to congestion. This can be improved by optimizing the work zone length. The focus of this study is to model work zones using cellular automata model and to find the effects of work zones on traffic flow. The methodology adopted in the study involved creating work-zone on the road by blocking some of the cells and then determining traffic characteristics such as delay and queue lengths for model validation. For this the lateral movement rules of the existing Cellular Automata model were modified in order to replicate the traffic movement near work zones. This model is calibrated and validated using data from work zone observed near a metro rail station in Delhi. From the analysis it was evident that the queue length increased with increase in the length of work zone. Several relationships were tried between delay and work zone length. Among them the rational form was found suitable.

PEMBOBOTAN PENILAIAN ASPEK KESELAMATAN DI ZONA KERJA PADA MASA PELAKSANAAN PROYEK PENINGKATAN JALAN

2017 ◽  
Vol 14 (1) ◽  
pp. 29
Author(s):  
Dewa Ketut Sudarsana ◽  
Mayun Nandiasa ◽  
Ida Bagus Made Artamana
Keyword(s):  
Road Safety ◽  
Warning Signs ◽  
Work Zone ◽  
Minimum Length ◽  
Work Zones ◽  
The Road ◽  
On The Road ◽  
Road Work ◽  
Hierarchy Process ◽  
Descriptive Method

Road safety is a topic that came out over the years and has now become a worldwideproblem. This can be picked up with the founding of the Decade of Action for Road Safety 2010-2020 by the United Nations. Efforts of prevention road safety during the implementation of roadimprovement has been specified in the path of contract execution. However, assessment of safetyaudits in the work zone on the road improvements has not been studied. Descriptive method used toidentify related attributes of safety in the work zone. Hierarchy and the weighting of each attribute isused the Analytical Hierarchy Process (AHP) method. The results obtained in, the weighting of the 4criteria division of work zones in sequence from the weight of greater are: the work zone; closerszone; initial taper zone and end taper zone by weight are: 59%; 27%; 9% and 6%. Weight rating ofalternative attributes for closers zone criteria is: road work warning signs: lane usage instructionssigns; closers zone distance; narrowing of lanes of the road warning signs and speed limit warningsigns, with their respective weights are: 46%; 23%; 15%; 11%; 5%. Weight rating attributesalternative to early taper zone criteria are: the installation of cone/guardrail; reflector at the initial ofthe work zone; minimum taper length requirement with respective weights: 53%; 30%; 17%.Assessment criteria attribute for the work zone are: minimum length of the work zone; the minimalwidth of the work zone; installation cone/guardrail; and the minimum distance between work zones,with respective weights: 70%; 15%; 9%; 6%. And the weight of attribute ratings for end zonecriteria is: the installation of cone/guardrail and followed with a minimum length end taperrequirements, with respective weights: 82%; 18%. Abstrak: Keselamatan Jalan merupakan isu yang mengemuka dari tahun ke tahun dan saat ini sudahmenjadi permasalahan global. Hal ini dapat dilihat dengan dicanangkannya Decade of Action forRoad Safety 2010-2020 oleh Perserikatan Bangsa Bangsa. Upaya pencegahan keselamatan dijalanselama masa pelaksanaan peningkatan jalan telah diatur dalam kontrak pelaksanaan jalan. Namuncara penilaian pemeriksaan keselamatan di jalan pada zona kerja pelaksanaan peningkatan jalanbelum diteliti. Metode deskriptif digunakan untuk mengidentifikasi atribut terkait aspek keselamatandi zona kerja pekerjaan jalan. Hirarki dan pembobotan penilaian masing masing atributmenggunakan metode Proses Hirarki Analitikal (PHA). Hasil rancangan pembobotan pada levelkreteria medapatkan 4 kreteria pembagian zona kerja secara teurut dari bobot kepentingan yanglebih besar adalah zona kerja; zona pendekat; zona taper awal dan zona taper akhir dengan bobotadalah 59%; 27%; 9% dan 6%. Bobot penilaian atribut alternative untuk kreteria zona pendekatadalah: rambu peringatan ada pekerjaan jalan; rambu petunjuk penggunaan lajur; jarak zonapendekat; rambu peringatan penyempitan lajur jalan dan rambu peringatan batas kecepatan, denganbobot masing-masing adalah: 46%; 23%; 15%; 11%; 5%. Bobot penilaian atribut alternative untukkreteria zona taper awal adalah: pemasangan kerucut/guardrail; pemasangan reflector padapertemuan taper awal dengan zona kerja; persyaratan panjang taper minimum dengan bobot masingmasing:53%; 30%; 17%. Penilaian atribut untuk kreteria zona kerja adalah: panjang zona kerjaminimum: lebar zona kerja minimum; pemasangan kerucut/guardrail; dan jarak antar zona kerjaminimum, dengan bobot masing-masing: 70%; 15%; 9%; 6%. Dan bobot penilaian atribut untukkreteria zona penjauh adalah: pemasangan kerucut/guardrail dan diikuti dengan persyaratanpanjang taper akhir minimum, dengan bobot masing-masing: 82%; 18%.Kata kunci: keselamtan, metode PHA, zona kerja, peningkatan jalan

scholarly journals Extracting Road Traffic Volume in the City before and during covid-19 through Video Remote Sensing

2021 ◽  
Vol 13 (12) ◽  
pp. 2329
Author(s):  
Elżbieta Macioszek ◽  
Agata Kurek
Keyword(s):  
Travel Behavior ◽  
Traffic Management ◽  
Road Traffic ◽  
Traffic Volume ◽  
The Road ◽  
Traffic Characteristics ◽  
Annual Average Daily Traffic ◽  
On The Road ◽  
The Impact ◽  
The City

Continuous, automatic measurements of road traffic volume allow the obtaining of information on daily, weekly or seasonal fluctuations in road traffic volume. They are the basis for calculating the annual average daily traffic volume, obtaining information about the relevant traffic volume, or calculating indicators for converting traffic volume from short-term measurements to average daily traffic volume. The covid-19 pandemic has contributed to extensive social and economic anomalies worldwide. In addition to the health consequences, the impact on travel behavior on the transport network was also sudden, extensive, and unpredictable. Changes in the transport behavior resulted in different values of traffic volume on the road and street network than before. The article presents road traffic volume analysis in the city before and during the restrictions related to covid-19. Selected traffic characteristics were compared for 2019 and 2020. This analysis made it possible to characterize the daily, weekly and annual variability of traffic volume in 2019 and 2020. Moreover, the article attempts to estimate daily traffic patterns at particular stages of the pandemic. These types of patterns were also constructed for the weeks in 2019 corresponding to these stages of the pandemic. Daily traffic volume distributions in 2020 were compared with the corresponding ones in 2019. The obtained results may be useful in terms of planning operational and strategic activities in the field of traffic management in the city and management in subsequent stages of a pandemic or subsequent pandemics.

scholarly journals A Cellular Automata Model for Integrated Simulation of Land Use and Transport Interactions

2021 ◽  
Vol 10 (3) ◽  
pp. 149
Author(s):  
Nuno Pinto ◽  
António P. Antunes ◽  
Josep Roca
Keyword(s):  
Land Use ◽  
Cellular Automata ◽  
Land Use Change ◽  
Urban Studies ◽  
Particle Swarm Algorithm ◽  
Cellular Automata Model ◽  
Integrated Simulation ◽  
The Road ◽  
Ca Model ◽  
The City

Cellular automata (CA) models have been used in urban studies for dealing with land use change. Transport and accessibility are arguably the main drivers of urban change and have a direct influence on land use. Land use and transport interaction models deal with the complexity of this relationship using many different approaches. CA models incorporate these drivers, but usually consider transport (and accessibility) variables as exogenous. Our paper presents a CA model where transport variables are endogenous to the model and are calibrated along with the land use variables to capture the interdependent complexity of these phenomena. The model uses irregular cells and a variable neighborhood to simulate land use change, taking into account the effect of the road network. Calibration is performed through a particle swarm algorithm. We present an application of the model to a comparison of scenarios for the construction of a ring road in the city of Coimbra, Portugal. The results show the ability of the CA model to capture the influence of change of the transport network (and thus in accessibility) in the land use dynamics.

scholarly journals Validation of CO dispersion model due to the road position on the dominant wind direction on transport sector

2018 ◽  
Vol 197 ◽  
pp. 13017 ◽  
Author(s):  
Vera Surtia Bachtiar ◽  
Purnawan ◽  
Reri Afrianita ◽  
Randa Anugerah
Keyword(s):  
Wind Direction ◽  
Dispersion Model ◽  
Transport Sector ◽  
The Road ◽  
Validation Test ◽  
Traffic Characteristics ◽  
Significant Difference ◽  
Co Concentration ◽  
On The Road ◽  
Co Dispersion

This study aims to validate CO dispersion model due to the position of the road toward the dominant wind direction on the transport sector. Sampling for modelling was done on the road with the road angle to wind direction is 0 degree (Jend. A. Yani Road), 30 degree (Andalas Road) and 60 degree (Prof. Dr. Hamka Road). CO dispersion model was obtained from the relations between CO concentration with traffic volume, traffic speed, wind speed and dominant wind direction. Sampling for validation was done at three location points, i.e. Jend. Ahmad Yani Road, By Pass Road and Dr. Wahidin Road, each of which has a position of 0, 45 and 90 degrees toward dominant wind direction. Sampling for CO was done using impinger. Measurement of traffic characteristics and meteorological conditions was performed in conjunction with CO sampling. Validation test was done by using Pearson Product Moment formula and Test of Two Variance. Results of the Two-Variance Test showed no significant difference between two concentrations of CO model and CO measurement. It showed the Test Ratio (RUf) smaller than the Critical Point. Validation test using Pearson Product Moment showed that the CO model can be used for predicting CO dispersion.

Validating the Performance of the FHWA Work Zone Model Version 1.0: A Case Study along I-91 in Springfield, Massachusetts

2018 ◽  
Vol 2672 (16) ◽  
pp. 46-56 ◽  
Author(s):  
Andrew Berthaume ◽  
Lauren Jackson ◽  
Ian Berg ◽  
Brian O’Donnell ◽  
Christopher L. Melson
Keyword(s):  
Performance Metrics ◽  
Near Field ◽  
Work Zone ◽  
Driver Model ◽  
Zone Model ◽  
Work Zones ◽  
Simulation Tools ◽  
Zone Management ◽  
Using Data ◽  
Model Components

Central to the effective design of work zones is being able to understand how drivers behave as they approach and enter a work zone area. States use simulation tools in modeling freeway work zones to predict work zone impacts and to select optimal design and deployment strategies. While simple and complex microscopic models have been used over the years to analyze driver behavior, most models were not designed for application in work zones. Using data collected from an instrumented research vehicle and model components from two PhD dissertations, FHWA created the Work Zone Driver Model and programed the Work Zone Driver Model DLL v1.0, a software that could override car-following in commercial microsimulation software packages so that practitioners can better predict work zone impacts. This paper demonstrates the capabilities of the FHWA Work Zone Driver Model DLL v1.0, interfaced with VISSIM and tested on an Interstate work zone in Springfield, Massachusetts. The dynamic link library’s (DLL’s) performance is compared with field data collected using an instrumented research vehicle and to Weidemann 99 in VISSIM. Performance metrics were selected to align with state department of transportation work zone management efforts. Results showed acceptable performance from the DLL, as it predicted queue locations and travel speeds that were near field observations. Limitations of the DLL and interface are discussed, and opportunities for improving version 2.0 are described.

Driver Behavior in Response to Flashing Lights

2019 ◽  
Vol 2673 (5) ◽  
pp. 703-708 ◽  
Author(s):  
Kristin Kersavage ◽  
Nicholas P. Skinner ◽  
John D. Bullough ◽  
Philip M. Garvey ◽  
Eric T. Donnell ◽  
...  
Keyword(s):  
Driver Behavior ◽  
Sequential Pattern ◽  
Work Zone ◽  
Lane Change ◽  
Work Zones ◽  
The Road ◽  
The Individual ◽  
The Right ◽  
Warning Lights ◽  
Current Standards

Flashing yellow warning lights notify drivers about the presence of work along the road. Current standards for these lights address performance of the individual light but not how lights should function when multiple lights are used. In the present study, warning lights were used to delineate a lane change taper in a simulated work zone. Lights flashed with varying intensities and either randomly or in sequence, with lights flashing in turn along the length of the lane change taper, either to the right or to the left. In half of the trials, a flashing police light bar was used on a vehicle located within the simulated work zone. Participants were asked to drive a vehicle approaching the work zone and to identify, as quickly as possible, in which direction the taper’s lane change was (either to the right or left). Drivers were able to correctly identify the taper from farther away when the lights flashed in a sequential pattern than when the flash pattern was random; and the presence of a police light bar resulted in shorter identification distances. The results, along with previous research, can inform standards for the use of flashing lights and police lights in work zones for the safety of drivers and workers.

Collective behaviour of wild Asian elephants in risky situations: how do social groups cross roads?

Behaviour ◽  
2017 ◽  
Vol 154 (12) ◽  
pp. 1215-1237 ◽  
Author(s):  
Kaori Mizuno ◽  
Nachiketha Sharma ◽  
Gen’ichi Idani ◽  
Raman Sukumar
Keyword(s):  
National Park ◽  
Group Living ◽  
Age Classes ◽  
Asian Elephants ◽  
The Road ◽  
Traffic Characteristics ◽  
Group Members ◽  
On The Road ◽  
Free Ranging ◽  
Road Crossing

Among group-living animals, some members may derive benefit by following the decisions of other members. Free-ranging wild Asian elephants in Mudumalai National Park, southern India, must often cross roads and can be disturbed by vehicles. We assessed if measures of road and traffic characteristics serve as indicators of risk, and compared behaviours of different age classes during road-crossing events. More individuals displayed excitable behaviour on wider roads. A larger number of adults entered the road first, which is considered the most dangerous position, compared with immature elephants. Immature individuals tended to move ahead of others on the road, suggesting that it is more important for immature individuals to follow adults at the beginning of a crossing than to follow along for the entire crossing. These findings may suggest that less experienced group members derive benefit by following the decisions of experienced ones under risky situations.

scholarly journals Practical Road-Resistance Functions for Expressway Work Zones in Occupied Lane Conditions

2019 ◽  
Vol 11 (2) ◽  
pp. 382
Author(s):  
Chi Zhang ◽  
Jihan Qin ◽  
Min Zhang ◽  
Hong Zhang ◽  
Yudi Hou
Keyword(s):  
Traffic Safety ◽  
Goodness Of Fit ◽  
Traffic Volume ◽  
Work Zone ◽  
Traffic Load ◽  
Work Zones ◽  
Goodness Of Fit Test ◽  
The Road ◽  
Resistance Function ◽  
Critical Traffic

In order to create a practical road-resistance function for work zones under different lane occupation conditions, the expected speed of vehicles was calibrated in the work zone simulation model based on measured data, and simulation models were constructed for the closed half lane and the closed inside lane under different rates of trucks. Based on the statistical theory, the influence of significance of traffic volume and truck ratios for road resistance was analyzed, and a suitable truck ratio was found for the work zone. By using the optimal nonlinear fitting theory, the practical road-resistance function for work zones under different lane occupation conditions was constructed. The results showed that the road resistance is significantly affected by the traffic volume and rate of trucks. Under the same truck ratio, the road resistance linearly increases slowly when the traffic volume is less than the critical traffic volume and rapid increases irregularly when it is greater than the critical traffic volume. Under the same traffic load, the road resistance of the work zone increases with the increase in the rate of trucks, and the difference is not obvious when the traffic volume is less than the critical traffic volume, and increases gradually when it is greater than the critical traffic volume. Through the goodness of fit test and the homogeneity of variance test, the road-resistance function constructed in this paper has high goodness of fit. The practical road-resistance functions constructed in this study could be used to guide the diversion of the rebuilt/expanded highway to ensure traffic safety. Further, the study provides a theoretical basis for the construction of intelligent highway work zones.

scholarly journals Effect Analysis of Early Warning for Abandoned Object on Highway Based on Internet-of-Vehicles CA Model

2018 ◽  
Vol 2018 ◽  
pp. 1-14
Author(s):  
Juan Bao ◽  
Wei Chen ◽  
Zhengtao Xiang ◽  
Yufeng Chen ◽  
Yishui Shui
Keyword(s):  
Cellular Automata ◽  
Early Warning ◽  
Traffic Accidents ◽  
Road Density ◽  
Accident Rate ◽  
Effect Analysis ◽  
Cellular Automata Model ◽  
Internet Of Vehicles ◽  
The Road ◽  
Abandoned Object

An early warning on the highway will effectively reduce traffic accidents. Considering the influence of an abandoned object on driving behavior, a Visual-based Asymmetric Two-lane Cellular Automata model with Abandoned Object (V-ATCA-AO) and an Internet-of-Vehicles-based Asymmetric Two-lane Cellular Automata model with Abandoned Object (IoV-ATCA-AO) are proposed. Based on the two models, two types of traffic accidents caused by an abandoned object are analyzed: rear-end collision caused by the abandoned object ahead and collision of the vehicle with the abandoned object. Simulation results show the following: (1) the accidents occur when the road density is smaller, while the accidents will not occur when the density is larger. The results are different from the rear-end collision rate curve without abandoned object in a single lane. (2) Compared with the visual-based avoidance pattern in V-ATCA-AO, the Internet-of-Vehicles-based avoidance pattern in IoV-ATCA-AO can create an early warning for the abandoned object and tell the vehicle to make an earlier lane change and decelerate in advance, thereby significantly reducing the accident rate. (3) Spatiotemporal characteristics in front of the abandoned object directly affect the accident rate: the less the “stability” of a traffic jam in front of the abandoned object, the higher the accident rate.

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