scholarly journals INVESTIGATION INTO TRAFFIC FLOWS ON HIGH INTENSITY STREETS OF VILNIUS CITY

Transport ◽  
2010 ◽  
Vol 25 (3) ◽  
pp. 244-251 ◽  
Author(s):  
Laura Žiliūtė ◽  
Alfredas Laurinavičius ◽  
Audrius Vaitkus
Keyword(s):  
Traffic Safety ◽  
Traffic Volume ◽  
Capital City ◽  
State Enterprise ◽  
Traffic Intensity ◽  
Road Maintenance ◽  
Traffic Flows ◽  
The Road ◽  
Maintenance Program ◽  
Road Research Laboratory

The measurements and analysis of traffic intensity were performed in the capital city – Vilnius, the largest urban area in Lithuania. Vilnius is a centre of business, industry and tourism, and therefore traffic intensity remains the highest in this part of the country. The intensity of vehicle traffic is not only generally calculated but also simultaneously classified which means is divided predefining vehicles into beforehand established categories. Data on traffic flows are used in a road maintenance program for calculating and assessing air pollution, ensuring traffic safety, regulating traffic flows etc. The article presents the methods for measuring traffic intensity which are and were used for calculating traffic intensity not only in the streets of Vilnius but also across Lithuania. Data on vehicle intensity and classification are collected either using technologies (loop and tube detectors, counters and video detectors) or expressing them visually. The article presents the dynamics of changes in the traffic volume on the roads of Lithuania for the period 2000–2009. Also, this article examines traffic intensity of all transport means, including trucks in the permanent traffic volume measuring stations that were installed near the roads in Vilnius zone (data on traffic for the period 2005–2009) and the streets of Vilnius city (data on traffic for the period 2007–2009). Data on traffic intensity were obtained by the Road Research Laboratory of the Road Department of Vilnius Gediminas Technical University in cooperation with the State Enterprise Transport and Road Research Institute (TRRI).

scholarly journals ANALISIS TERHADAP IMPLEMENTASI KEBIJAKAN PENGELOLAAN JALAN DI KABUPATEN BANYUMAS

2012 ◽  
Vol 12 (2) ◽  
Author(s):  
Sri Hartini ◽  
Setiajeng Kadarsih
Keyword(s):  
Road Construction ◽  
Management Policy ◽  
Road Maintenance ◽  
The Road ◽  
Goods And Services ◽  
Maintenance Factors ◽  
Road Management ◽  
Maintenance Program ◽  
Periodic Maintenance ◽  
The Government

Basically, the management of roads expected to be able to meet the needs of safe, convenient, and efficient for transportation of goods and services. But in reality, the road management policy in the regional autonomy were still did not meet expectations. Based on the research, the policy of road management in Banyumas are roads construction and road maintenance program. Road construction are conducted to increasing and widening of roads and paving, while road maintenance are done through regular maintenance and periodic maintenance. Factors that influence the policy are legal substance that have not been set as a whole regarding the management of roads, law enforcement which still have its main office in the policyled, facility factor that were not optimal, the society that tend to release responsibility to the government, and permissive factors. Key words: policy, road management and legal factors

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 Simulation-Based Analysis of the Effect of Significant Traffic Parameters on Lane Changing for Driving Logic “Cautious” on a Freeway

2019 ◽  
Vol 11 (21) ◽  
pp. 5976
Author(s):  
Danish Farooq ◽  
Janos Juhasz
Keyword(s):  
Regression Model ◽  
Traffic Safety ◽  
Traffic Volume ◽  
Lane Change ◽  
Lane Changing ◽  
Safety Issues ◽  
The Road ◽  
Speed Distribution ◽  
On The Road ◽  
High Traffic Volume

Lane changing of traffic flow is a complicated and significsant behavior for traffic safety on the road. Frequent lane changing can cause serious traffic safety issues, particularly on a two-lane road section of a freeway. This study aimed to analyze the effect of significant traffic parameters for traffic safety on lane change frequency using the studied calibrated values for driving logic “conscious” in VISSIM. Video-recorded traffic data were utilized to calibrate the model under specified traffic conditions, and the relationship between observed variables were estimated using simulation plots. The results revealed that changes in average desired speed and traffic volume had a positive relationship with lane change frequency. In addition, lane change frequency was observed to be higher when the speed distribution was set large. 3D surface plots were also developed to show the integrated effect of specified traffic parameters on lane change frequency. Results showed that high average desired speed and large desired speed distribution coupled with high traffic volume increased the lane change frequency tremendously. The study also attempted to develop a regression model to quantify the effect of the observed parameters on lane change frequency. The regression model results showed that desired speed distribution had the highest effect on lane change frequency compared to other traffic parameters. The findings of the current study highlight the most significant traffic parameters that influence the lane change frequency.

scholarly journals PREREQUISITE FOR ACCIDENT-FREE TRAFFIC AT SIGNAL-CONTROLLED INTERSECTIONS

2021 ◽  
Vol 6 (1) ◽  
pp. 73-80
Author(s):  
Andrey Gorev ◽  
◽  
Olga Gasilova ◽  
Boris Sidorov ◽  
◽  
...  
Keyword(s):  
Traffic Safety ◽  
Traffic Accident ◽  
Traffic Accidents ◽  
Green Light ◽  
Traffic Intensity ◽  
Traffic Flows ◽  
Safe Distance ◽  
The City ◽  
Minimum Safe Distance ◽  
Maximum Intersection

Introduction: Improving intersection capacity will not be possible without accounting for traffic safety. Purpose of the study: We aim to determine the prerequisite for accident-free traffic at signal-controlled intersections with turning traffic flows. Methods: In our study, we used the methods of observation, comparison, and mathematical analysis. Results: We have carried out a field observation of traffic intensity at signal-controlled intersections in the city of Yekaterinburg, focusing on vehicles that moved when the green light was on. We have also analyzed traffic flow moving in three directions in the same lanes. We have discovered that traffic accident likelihood is the highest (54%) at four-way intersections. Three-way intersections account for 44% of traffic accidents, while the remaining 2% of accidents occur at multi-way intersections. Furthermore, we have determined the additional factors that impact safety in turning traffic flows at intersections. Our study demonstrates that in order to ensure maximum intersection capacity, the duration of the traffic signal cycle must be adjusted with the minimum safe distance between vehicles in mind.

SUSTAINABLE ECOLOGICAL DEVELOPMENT REDUCING NEGATIVE EFFECTS OF ROAD MAINTENANCE SALTS

2009 ◽  
Vol 15 (1) ◽  
pp. 178-188 ◽  
Author(s):  
Pranas Baltrėnas ◽  
Agnė Kazlauskienė
Keyword(s):  
Traffic Safety ◽  
Road Maintenance ◽  
Negative Effects ◽  
The Road ◽  
Alternative Materials ◽  
Ecological Development ◽  
Negative Effect ◽  
Environmental Laboratory ◽  
Laboratory Investigations ◽  
On The Road

To ensure traffic safety in winter, large amounts of technical salts (chlorides) are applied on roads. De‐icing salts directly or indirectly contaminate the road environment and have a negative effect on the components of road environment. The analysis of the situation raises a question: how to ensure traffic safety in wintertime applying salts and achieve sustainable development. The article presents the investigations of chloride concentrations on the roadsides of a highway. In 5 recent years, complex environmental laboratory investigations and investigations under natural conditions of the effect of salts on the components of the road environment have been carried out proving their toxic effect. Consequently, to reduce a negative effect of salts on the road environment, measures of sustainable ecological development have to be taken. To achieve a balanced use of salts, the proposal is to apply alternative materials (formiates, molasses‐based material). The introduction of biotechnical measures (an infiltration‐grassy ditch, biological and chemical indication on roadsides) is expedient to eliminate the consequences but not the reasons of salt use. Santrauka Žiemos sezonu eismo saugumui užtikrinti naudojami dideli kiekiai techninių druskų (chloridų). Slidumui šalinti barstomosios druskos tiesiogiai ir netiesiogiai užteršia kelio aplinką ir neigiamai veikia kelio aplinkos komponentus. Todėl kyla klausimas – kaip užtikrinti eismo saugumą žiemą naudojant druskas bei įgyvendinti darnaus vystymosi nuostatas. Straipsnyje pateikti chloridų koncentracijų tyrimai magistralinio kelio, kertančio saugomas teritorijas, pakelių dirvožemyje. Pastaruosius penkerius metus vykdomi kompleksiniai aplinkosaugos laboratoriniai ir natūriniai druskų poveikio kelio aplinkos komponentams tyrimai įrodo nuodingą jų poveikį. Todėl būtina imtis darnaus ekologinio vystymo priemonių, mažinant neigiamą druskų įtaką kelio aplinkai. Siekiant nepadidinti naudojamų druskų kiekio, siūlomos alternatyvios medžiagos (formiatai, melasos pagrindu pagaminta medžiaga). Druskų sukeliamoms pasekmėms (ne priežastims) pašalinti tikslinga įdiegti biotechnines priemones (infiltracinis-žolinis griovys, biologinė ir cheminė indikacija pakelėse).

scholarly journals FUNCTIONING AND DYNAMICS OF LANDSCAPES IN THE DESIGN OF HIGHWAYS IN MOUNTAINOUS CONDITIONS

2020 ◽  
Vol 12 (4) ◽  
pp. 565-571
Author(s):  
Levan KORTIEV ◽  
◽  
Alan KORTIEV ◽  
Sarmat VANEEV ◽  
Robert KULUMBEGOV ◽  
...  
Keyword(s):  
Traffic Safety ◽  
Road Construction ◽  
Integrated Approach ◽  
Correct Choice ◽  
Landscape Design ◽  
Road Maintenance ◽  
Negative Consequences ◽  
Engineering Structures ◽  
Design Elements ◽  
The Road

Introduction. Roads, as linear engineering structures in mountainous conditions for the sake of traffic safety, should provide a smooth interface and their harmonious combination with the surrounding landscape with the use of longitudinal slopes and radii on curves that reduce accidents and injuries. Anthropogenic intervention on the mountain natural landscape, for the purpose of road construction, is not always safe, because weak soils come into dynamics and the functioning of the road is complicated. For this , it is necessary to conduct a spatial analysis and an integrated approach to the issue, covering all aspects of landscape design of the road to eliminate negative consequences. The essence of the question. The design of highways in mountainous areas without observing the landscape principles of safe operation and with less dynamic shifts of the roadbed leads to a violation of the relief forms, with the implementation of large volumes of earthworks necessary to ensure the projected slope. Research methods. In the process of writing the article, the following methods were used: analysis - in the search and analysis of literature on the subject; observation and comparison in the study and selection of the optimal option. Conclusions: 1. When designing highways in mountain landscapes, it is necessary to find a harmonious combination of the functioning of the road and the landscape itself. 2. A scientifically based analysis and correct choice of landscape design elements in the operation of the road will reduce the dynamics of slope phenomena, the number of accidents, the cost of road maintenance, which contribute to improving safety on mountain roads.

scholarly journals LATEST ASSESSMENT OF TRAFFIC CONDITIONS ON ROADS «TRIAD OF TRAFFIC»

2021 ◽  
Vol 1 (48) ◽  
pp. 166-177
Author(s):  
Lanovoy O ◽  
◽  
Kyselov V ◽  
Vyhovska I ◽  
◽  
...  
Keyword(s):  
Transport System ◽  
Traffic Safety ◽  
Road Transport ◽  
Traffic Flows ◽  
Transport Costs ◽  
The Road ◽  
Traffic Conditions ◽  
Road Users ◽  
Highway Network ◽  
Rational Management

The article explores the driving conditions for determining the demand of drivers of vehicles for the movement of roads, the road conditions of which should ensure this demand. The object of the study is automobile international and national transport corridors. When optimizing the management of the complex transport system «International, national and local traffic flows - Automotive International and National Transport Corridors» (MNMTP-AMNTC) can be sought to achieve different goals (criteria of optimality), and, depending on these goals, consider the different tasks of optimal management. On road transport, including in this concept of the system of communication routes (highways), the following tasks are the most important: ensuring the least time of communication at limited road costs; - ensuring the specified time of communication at the lowest road costs; - ensuring the lowest transport costs at a limited level of road costs; - ensuring the lowest road costs at a limited level of transport costs; - ensuring the maximum possible level of traffic safety at a limited level of road costs; - ensuring the required level of traffic safety at the lowest road costs; to achieve a minimum of road costs, provided that the specified volume of traffic (traffic), the specified speed and the necessary safety of traffic; ensuring maximum road capacity at a limited level of road costs. According to its parameters, the MMMTP-AMNTC refers to complex systems, the main characteristics of which are: efficiency indicator; stability; obstruction; Reliability. The newest approach of the «Traffic Triad» will allow to evaluate the functioning and ensure the rational management of any transport system with a focus on meeting the needs of users of highways - road users. KEYWORDS: HIGHWAY NETWORK, INTERNATIONAL, NATIONAL AND LOCAL TRAFFIC FLOWS, ROAD INTERNATIONAL AND NATIONAL TRANSPORT CORRIDORS.

scholarly journals Living snow fences for protection of roads: case study crest Čestobrodica

2019 ◽  
Vol 65 (4) ◽  
pp. 17-22
Author(s):  
Mladen Marković ◽  
Sara Lukić ◽  
Aleksandar Baumgertel ◽  
Marko Maslaković
Keyword(s):  
Traffic Safety ◽  
Storage Capacity ◽  
Road Maintenance ◽  
The Road ◽  
Snow Storage ◽  
Road Section ◽  
Snow Fence ◽  
Downwind Side ◽  
On The Road ◽  
Snow Fences

Snowdrifts caused by wind gusts reduce visibility on the road which endangers traffic safety, increases travel time and road maintenance costs. Based on previous experience and research it has been proven that living snow fence is an economical, ecological and efficient solution for protection of roads from snowdrifts. Living snow fences with their above-ground part, reduce the wind speed, act as a mechanical barrier for the snow and accumulate a certain amount of snow. This study presented use and efficiency of living snow fence in controlling snowdrifts on the road section Paraćin-Zaječar, locality – crest Čestobrodica. Analysis of environmental conditions, which are resented main endangering factor for snowdrifts, included the determination of indicators of possibility of snowdrifts: snowfall water equivalent (Swe), snow transport (Q) and ability of living snow fence to prevent snowdrifts: snow storage capacity of the fance (Qc). Snow storage capacity for living snow fence is analyzed for ten year period. Using equation for estimation of length of snowdrifts on downwind side of fance, a change in length of snowdrifts during the analyzed period are determin, and the efficiency of living snow fence in protection of the road from snowdrifts with increasing age.The results of this study represent a contribution to using living snow fence in solving the problem of roads protection from snowdrifts and increasing traffic safety during winter conditions.

Integrating acceleration signal processing and image segmentation for condition assessment of asphalt roads

2021 ◽  
Author(s):  
William Sprague ◽  
Ehsan Rezazadeh Azar
Keyword(s):  
Semantic Segmentation ◽  
Road Maintenance ◽  
Acceleration Response ◽  
The Road ◽  
Acceleration Signal ◽  
Video Footage ◽  
Maintenance Program ◽  
Acceleration Data ◽  
Small Acceleration ◽  
Vision Module

A proactive road maintenance system enables agencies to better allocate resources to manage their road networks. An inventory of the roads’ conditions is an essential component of such maintenance program. This research project proposes a hybrid system to asses the condition of the asphalt roads, which uses a dashboard-mounted smartphone to simultaneously collect the acceleration response of a vehicle and the video footage of the road surface while driving. The system analyzes acceleration data for anomalous events that could indicate a defect. Then the computer vision module of the system applies semantic segmentation in the corresponding frame to the detected anomaly to identify defects. This system demonstrated 84% recall and 88% precision rates in detection of anomalies in two road segments. Despite these promising results, the system can only detect the defects that are passed over and it could miss some defects with small acceleration responses, such as traverse cracks.

scholarly journals Study of Traffic Volume and its Safety Measurement at Dadabari Circle, Career Point University, Kota

2018 ◽  
Vol 8 (01) ◽  
Author(s):  
Raj Pratap Singh ◽  
Himanshu Tekwani ◽  
Bhavesh Joshi ◽  
Pratheek Sudhakaran ◽  
Jitendra Singh
Keyword(s):  
Traffic Flow ◽  
Traffic Safety ◽  
Traffic Volume ◽  
Heterogeneous Traffic ◽  
Traffic Condition ◽  
Passenger Car ◽  
The Road ◽  
Traffic Lane ◽  
Wide Range ◽  
On The Road

The knowledge of traffic volume is an important basic input required for planning, analysis and operation of roadway systems. A significant effort has been made in order to study the Traffic Volume of Dadabari Chauraha. For better understanding of the present status of traffic flow at the junction, traffic survey is conducted. The safe and time efficient movement of the people and goods is dependent on Traffic flow, which is directly connected to the traffic characteristics. In Traffic Flow we have to consider generally three parameters, Volume, Speed, and Capacity. While as a traffic volume may be defined as the number of vehicles passing a given section of road or traffic lane per unit time will be inappropriate when several types of vehicles with widely varying static and dynamic characteristics are comprised in the traffic. Due to mixed nature of traffic it gets difficult to accommodate all the kinds of traffic on these roads. The basic problem arises during the peak hours of the day when the traffic volume is highest on the road. The interaction between moving vehicles under such heterogeneous traffic condition is highly complex. The problem of measuring volume of such kind of traffic has been addressed by converting the different types of vehicles into equivalent passenger cars and expressing the volume in terms of Passenger Car Unit (PCU) per hour. Calculation of Passenger Car Units (PCU’s) for different vehicle types had been made. For a wide range of traffic volume and roadway conditions indicate that the PCU value of a vehicle significantly changes with change in traffic volume and width of roadway. some of the remedial measures to improve the traffic safety in the region such as widening the road, changing 4-lane to 6-lane or by providing more public transport can be recommended based on the outcomes of the work.

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