scholarly journals ANALYSIS OF THE IMPACT OF TRAFFIC AND PEDESTRIANIZATION ENVIRONMENT IN MALIOBORO

2021 ◽  
Vol 1000 (1000) ◽  
Author(s):  
Ahmad Munawar
Keyword(s):  
Traffic Flow ◽  
Traffic Management ◽  
Exhaust Emissions ◽  
City Government ◽  
Saturation Level ◽  
Vehicle Exhaust ◽  
Side Friction ◽  
The Impact ◽  
Yogyakarta City

he phenomenon of the increasing number of Malioboro tourists every year raises traffic problems in the area. Starting from congestion, increasing vehicle exhaust emissions, to increasing side friction. This has put pressure on the Yogyakarta city government to plan to improve traffic management by transforming the Malioboro area into a pedestrianized area. This application has an impact on significant changes in traffic flow on roads around the Malioboro area. This study will simulate a traffic flow scenario on roads around Malioboro using VISSIM software to determine the saturation level of the flow and the resulting emissions.

scholarly journals Evaluating the Effects of One-Way Traffic Management on Different Vehicle Exhaust Emissions Using an Integrated Approach

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Jieyu Fan ◽  
Kun Gao ◽  
Yingying Xing ◽  
Jian Lu
Keyword(s):  
Traffic Management ◽  
Integrated Approach ◽  
Exhaust Emissions ◽  
Traffic Emissions ◽  
Specific Power ◽  
Emission Measurement ◽  
Emission Rates ◽  
Vehicle Exhaust ◽  
Emission Data ◽  
The Road

One-way traffic management is a recognized traffic organization to improve traffic efficiency and safety, but its effects on different traffic emissions remains unclear. This paper aims to investigate the impacts of one-way traffic management on three typical vehicle exhaust emissions including Carbonic Oxide (CO), Hydrocarbon Compounds (HC), and Nitrogen Oxides (NOx) in a traffic system using an integrated approach. Field experiment was conducted to collect the vehicular emission data under different traffic conditions using the onboard portable emission measurement system. An instantaneous emission model (i.e., Vehicle Specific Power) is calibrated using the collected field emission data and is incorporated into the microscopic traffic simulation tool VISSIM for quantifying the emissions before and after one-way traffic management through simulation. Two scenarios based on real networks and traffic demands of peak hours in part areas of Shanghai are developed for simulation and evaluation. The results show that in the intersections, the emission rates of COHC, NOx after one-way traffic management is significantly reduced by 20.46%, 21.29% and 21.06%, respectively. In the road sections, the emission rates of CO, HC, NOx in the road sections decrease by 23.38% and 26.29%. The overall CO, HC, NOx emissions in the studied network reduce by 21.34%, 22.29% and 23.77% separately due to one-way traffic management. The results provide insights into the derivative effects of one-way traffic management on traffic emissions in the intersections, road sections and network levels, and thus support scientific traffic management for promoting the sustainability of transport system.

scholarly journals School Zoning Policy and Equalization of Education Access for Poor Students in Yogyakarta City

2021 ◽  
Author(s):  
Mami Hajaroh ◽  
Riana Nurhayati ◽  
Fajar Sidiq ◽  
Amrih Setyo Raharjo ◽  
Ebni Sholikhah
Keyword(s):  
High Schools ◽  
Central Government ◽  
Junior High ◽  
City Government ◽  
Junior High Schools ◽  
Equal Access ◽  
Access To Education ◽  
The Impact ◽  
Yogyakarta City

This study aimed to evaluate the impact of school zoning policies on equal access to education for underprivileged students in Yogyakarta City. This research was motivated by the low quality and inadequate access to education for underprivileged students in Indonesia. Starting in 2018, the Central Government implemented a school zoning policy to improve the quality and equitable access to education for underprivileged families in every region. This research was carried out in 16 State Junior High Schools in Yogyakarta City. This was the research location because it was one of the national pilot areas chosen by the Central Government. A quantitative approach was used to evaluate secondary school data before and after the implementation of the zoning policy. The results showed that: (1) there was an increase in access to education for underprivileged students; and (2) the imbalance in the quality of favorite and non-favorite schools did not change and this was influenced by the economic conditions of each region. It can be concluded that the school zoning policy increased equal access to education for underprivileged students, but the next challenge for the Yogyakarta City Government is ensuring equal quality of education across junior high schools. Keywords: school zoning policy, equal access, junior high school, underprivileged student

scholarly journals ANALISA TINGKAT PELAYANAN SIMPANG TAK BERSINYAL TIPE T DENGAN METODE HCM 2000 ( Studi Kasus jalan Merdeka Barat Kota Lhokseumawe )

2017 ◽  
Vol 2 (2) ◽  
Author(s):  
Hanafiah Hanafiah
Keyword(s):  
Traffic Flow ◽  
Traffic Management ◽  
City Government ◽  
Degree Of Saturation ◽  
Geometric Condition ◽  
Analysis Method ◽  
Flow Capacity ◽  
Alternative Approach ◽  
Surrounding Areas ◽  
Road Widening

Lhokseumawe city is the capital of Lhokseumawe City Government as well as the center of trade activities, education and social and culture which every day passed throught by the traffic flow from the surrounding areas. As a result of several potential intersections would be conflict and prone jammed. One of the conflict-prone locations is at the intersection of Jalan Merdeka Barat -Jaya Sakti. This conflict cousted by no traffic signs provided there geometric condition of intersection is not standard, so that during the rush hours tends to be congestion. In connection to these problems, this study tried to analyze performance of the intersection as traffic management solutions to overcome bottlenecks in the area of Jalan Merdeka Barat intersection. Survey data acquisition in the third crossing arm were done by recording the movement of traffic with a handy cam records for 3 days, during rush hours in the morning, afternoon and evening. The results of the analysis method on the condition of existing HCM 2000, the amount of delay on the Eastern arm 19.75 ses/smp, located at the level of service C, the delay arm west and south 30.76 sec/smp, located at the level peleyanan D. Alternative approach road widening the Jalan Jaya Jaya Sakti to 7 meters and Jalan Merdeka Barat to 14 meters, 4-lane 2-way use can reduce the median performace of intersection.Keywords: intersection fermormance, traffic flow, capacity, degree of saturation

Improve urban traffic efficiency with prohibiting left-turn policy

2021 ◽  
Author(s):  
Meng-Qin Cheng ◽  
Lele Zhang ◽  
Xue-Dong Hu ◽  
Mao-Bin Hu
Keyword(s):  
Traffic Flow ◽  
Traffic Management ◽  
Critical Length ◽  
Urban Traffic ◽  
Flow Density ◽  
Route Guidance ◽  
Left Turn ◽  
Traffic Efficiency ◽  
Quickest Path ◽  
The Impact

Enhancing traffic flow plays an important role in the traffic management of urban arterial networks. The policy of prohibiting left-turn (PLT) at selected highly demanded intersections has been adopted as an attempt to increase the efficiency at these intersections. In this paper, we study the impact of PLT by mathematical analysis and simulations based on the cellular automaton model. Using the flow-density relation, three system performance indexes are examined: the average trip completion rate, the average traffic flow, and the average velocity of vehicles. Different route guidance strategies, including the shortest path and the quickest path, are investigated. We show that when left turn is prohibited, vehicles are distributed more homogeneously in the road network, and the system performs better and reaches a higher capacity. We also derive a critical length of link, above which the benefit of PLT will decrease.

scholarly journals The effect of vehicle exhaust emissions on morphometric and physiological characteristics of Rhus typhina

2018 ◽  
Vol 26 (3) ◽  
pp. 250-254 ◽  
Author(s):  
О. Р. Dzhygan ◽  
O. A. Mylnikova ◽  
I. A. Zaitseva
Keyword(s):  
Chlorophyll A ◽  
Photosynthetic Pigment ◽  
Exhaust Emissions ◽  
Control Group ◽  
Chlorophyll B ◽  
Vehicle Exhaust ◽  
The Road ◽  
Number Of Leaves ◽  
Rhus Typhina ◽  
The Impact

Rhus typhina L. (Staghorn Sumac) is fast-growing woody species that reproduces by rhizomes and seeds. Because of its biological benefits, this deciduous member of the Anacardiaceae family has been introduced from its native habitats in the east of North America to urbanized landscapes of Ukraine. In this study we anаlyse changes in morphometric and physiological indicators of 12-year plants of this species in artificial phytocenoses near highways in Pavlograd, Ukraine. Experimental plots were placed at a distance from 25 to 130 meters from the road. The control group of plants was at a distance of 1500 m from the highways. We measured the length and thickness of the annual sprout, number of leaves on it, the content of chlorophyll in the leaves and accumulation of cadmium and lead in the leaf tissues. It was found that, compared to the plants in the relatively clean area, the greatest decreases in the length of the annual shoots of the trees in the plantations were for those which were at a distance of twenty five metres and forty meters from the traffic lanes of the highways. The thickness of the annual shoots of the trees in the plantations did not differ from plants in the clean zone. The number of leaves on a one-year annual sprout at a distance of twenty five meters and forty meters from the path of moving sources of pollution was significantly lower compared to control. We evaluated the impact of vehicle exhaust emissions on the assimilatory organs. We identified a negative effect of the anthropogenic pollutants on photosynthetic pigment content in leaves. The amount of chlorophyll a and chlorophyll b decreased with decreasing distance from the plantation to the road. Changes in the content of chlorophyll b had a clear pattern. The concentration of this pigment and the amount of chlorophyll a + b decreased compared with control in the 130 meter area. The amount of toxic heavy metals (lead and cadmium) in the tissues of the leaf was significantly higher than the control values on all plots. The strongest negative effects of phytotoxicants on susceptible plants occurred in plantations in the twenty-five-meter zone, which led to deterioration of the decorative quality of the plants.

scholarly journals Road Pricing Effect on the Emission of Traffic Pollutants, a Case Study in Tehran

2016 ◽  
Vol 2 (7) ◽  
pp. 306-315 ◽  
Author(s):  
Mansour Hadji Hosseinlou ◽  
Abbas Zolfaghari ◽  
Mahdi Yazdanpanah
Keyword(s):  
Fuel Consumption ◽  
Traffic Flow ◽  
Traffic Management ◽  
Stated Preference ◽  
Road Pricing ◽  
Simulation Software ◽  
Emission Rates ◽  
The Road ◽  
Fuel Consumption Rate ◽  
The Impact

Road pricing is one of the main purposes of traffic management policies in order to reduce personal car use. Understanding the behaviour of drivers under the impact of the road pricing policy, can assist transportation planners in making better and more efficient decisions. This research aims at investigating the reactions of private car users to road pricing using stated preference (SP) method on the one hand, and on the other hand, studies the road pricing effect on traffic flow and pollutants. To this aim, the acceptance rate of pricing, which is obtained from modeling of survey data, as well as real traffic flow data in Shahid Hemmat Highway in Tehran, Iran, are applied as the simulation software input. Based on the results of this research, at the lowest price (TN11000), the contribution of toll acceptance is equal to 64/91 percent. The fuel consumption rate at this price decreases to 49/91% and the emission rate of CO2, NOx, particle material (PM) and volatile organic compounds (VOCs) pollutants decrease to 56.82%, 49.46%, 36.8% and 63.17%, respectively. At the highest price (TN10000), toll acceptability, fuel consumption, CO2, NOx, PM and VOC emission rates decrease to 5.47%, 3.57%, 3.98%, 2.85%, 1.22% and 4.86%, respectively.

scholarly journals Dampak Pencemaran Udara Terhadap Kualitas Udara Di Provinsi Bali

2020 ◽  
Vol 2 (2) ◽  
pp. 20-30
Author(s):  
Ni Putu Decy Arwini
Keyword(s):  
Air Pollution ◽  
Negative Impact ◽  
Exhaust Emissions ◽  
Raw Material ◽  
Gas Content ◽  
Motor Vehicles ◽  
Vehicle Exhaust ◽  
The One ◽  
Renewable Natural Resource ◽  
The Impact

The development of transportation technology now has made distance become increasingly meaningless, but without realizing there has been a degradation of the environment as a direct impact of the development of transportation technology. Exhaust emissions produced by each vehicle have now become the main source of pollution, which is about 70% of all factors causing pollution. Unconsciously that so far the air quality that is inhaled by the community has slowly decreased so that it is not realized until an adverse impact appears, then the community then realizes that there has been a very complicated problem as a result of transportation that is less environmentally friendly. Most of the fuel for transportation comes from refined petroleum which is a non-renewable natural resource so that on the one hand it has caused air pollution which greatly affects health besides the amount of raw material for fuel production of these vehicles is also running low so prices are set for consumption society also becomes more expensive.The purpose of this research is to find out how much the level of air pollution in Bali Province at several sample points as a result of motor vehicles, to find out the type and amount of hazardous gas content produced by motor vehicles in Bali Province, to determine the impact caused by the exhaust gas of the vehicle on the health of the respiratory tract of residents of the Province of Bali, as well as ways that can be taken to reduce the negative impact resulting from pollution caused by vehicle exhaust emissions.

scholarly journals Speed-Density Model of Interrupted Traffic Flow Based on Coil Data

2016 ◽  
Vol 2016 ◽  
pp. 1-12 ◽  
Author(s):  
Chen Yu ◽  
Jiajie Zhang ◽  
Dezhong Yao ◽  
Ruiguo Zhang ◽  
Hai Jin
Keyword(s):  
Traffic Flow ◽  
Traffic Management ◽  
Road Traffic ◽  
Flow Analysis ◽  
Density Model ◽  
Upper And Lower Bounds ◽  
Traffic Density ◽  
Density Relationship ◽  
Speed Fluctuation ◽  
The Impact

As a fundamental traffic diagram, the speed-density relationship can provide a solid foundation for traffic flow analysis and efficient traffic management. Because of the change in modern travel modes, the dramatic increase in the number of vehicles and traffic density, and the impact of traffic signals and other factors, vehicles change velocity frequently, which means that a speed-density model based on uninterrupted traffic flow is not suitable for interrupted traffic flow. Based on the coil data of urban roads in Wuhan, China, a new method which can accurately describe the speed-density relation of interrupted traffic flow is proposed for speed fluctuation characteristics. The model of upper and lower bounds of critical values obtained by fitting the data of the coils on urban roads can accurately and intuitively describe the state of urban road traffic, and the physical meaning of each parameter plays an important role in the prediction and analysis of such traffic.

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.

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