scholarly journals Heuristic Bike Optimization Algorithm to Improve Usage Efficiency of the Station-Free Bike Sharing System in Shenzhen, China

2019 ◽  
Vol 8 (5) ◽  
pp. 239 ◽  
Author(s):  
Zhihui Gu ◽  
Yong Zhu ◽  
Yan Zhang ◽  
Wanyu Zhou ◽  
Yu Chen
Keyword(s):  
Optimization Algorithm ◽  
Public Transportation ◽  
User Satisfaction ◽  
Small Scale ◽  
Supply And Distribution ◽  
Trip Chain ◽  
Large Numbers ◽  
Bike Sharing ◽  
New Type ◽  
Objective Basis

Station-free bike sharing systems (BSSs) are a new type of public bike system that has been widely deployed in China since 2017. However, rapid growth has vastly outpaced the immediate demand and overwhelmed many cities around the world. This paper proposes a heuristic bike optimization algorithm (HBOA) to determine the optimal supply and distribution of bikes considering the effect of bicycle cycling. In this approach, the different bike trips with separate bikes can be connected in space and time and converted into a continuous trip chain for a single bike. To improve this cycling efficiency, it is important to properly design the bicycle distribution. Taking Shenzhen as an example, we implement the algorithm with OD matrix data from Mobike and Ofo, the two large bike sharing companies which account for 80% of the shared bike market in Shenzhen, over two days. The HBOA results are as follows. 1) Only one-fifth of the bike supply is needed to meet the current usage demand if the bikes are used efficiently, which means a large number of shared bikes in Shenzhen remain in an idle state for long periods. 2) Although the cycling demand is high in many areas, it does not mean that large numbers of bikes are needed because the continuous inflow caused by the cycling effect of bikes will meet most of the demand by itself. 3) The areas with the highest demands for optimal bikes are residential, followed by industrial, public transportation, official and commercial areas, on both working and non-working days. This algorithm can be an objective basis for city related departments to manage station-free BSSs and be applied to design the layout of bikes in small-scale spatial units to help station-free BSSs operate efficiently and minimize the need to relocate the bikes without reducing the level of user satisfaction.

scholarly journals Design and optimization of the concept of a passenger train storage system

2019 ◽  
Vol 261 ◽  
pp. 02002
Author(s):  
Lucian Cucu ◽  
Marilena Stoica ◽  
Ionel Simion ◽  
Gina Florica Stoica
Keyword(s):  
European Union ◽  
Public Transportation ◽  
Storage System ◽  
Transportation System ◽  
The European Union ◽  
Passenger Train ◽  
Design And Optimization ◽  
Safe Storage ◽  
Railroad Transportation ◽  
New Type

The aim of this paper is to design a passenger train storage system. It concerns with the idea of safe storage in public transportation. The design consists of developing a new type of storage system complying with the standards of the European Union (EU) that can improve the railroad transportation system.

scholarly journals MANAGEMENT OF PUBLIC TRANSPORTATION PERFORMANCE MODEL BASED ON SAFETY TRANSPORTATION, PERIODIC TRANSPORTATION TEST, BEHAVIOR, AND SATISFACTION IN CIREBON CITY.

2020 ◽  
Vol 4 (2) ◽  
Author(s):  
Herry Hermawan
Keyword(s):  
Public Transportation ◽  
User Satisfaction ◽  
Human Error ◽  
Motor Vehicle ◽  
Performance Model ◽  
Urban Transport ◽  
World Health ◽  
Urban Systems ◽  
Intelligence Agency ◽  
National Police

The development of cities in Indonesia is marked by the high number of commuters (commuters) who travel between the main city and the surrounding city or district (hinterland) or between regions within a city due to an increase in population, population activities, types of services, and the relative functioning of the economy national and regional level of a country..       Transportation problems and challenges are multi-dimensional between transportation systems and urban systems, both operational, management and policy aspects. Urban transport policies that care about sustainable development in developing countries are very complex, but can be studied especially in the public transportation system because it is more possible when compared to private transport at this time.       In Indonesia, the number of motorized vehicles is increasing every year. The addition of that number in 2012 reached 10,036 million units, resulting in the population recorded in the Indonesian National Police increased 12% to 94.292 million units compared to only 84.19 million in 2011 (Kurniawan, 2013). Based on data from the National Police also stated that in 2012 there were 109,038 accident cases with 27,441 people died. Different data from the Coordinating Ministry for Economic Affairs and People's Welfare of the Republic of Indonesia states that motorcycle rider accidents have reached 120,226 times or 72% of all traffic accidents in a year. Most accident cases occur in people with lower middle economic level as motorcycle and public transportation users (State Intelligence Agency, 2013).       As released by WHO (World Health Organization), of all accidents that occur on the highway, the human error factor (human error) has the highest contribution, reaching between 80-90 percent compared to the factor of vehicle vehicle improperities ranging from 5-10 percent, as well as due to damage to road infrastructure by 10-20 percent (DG Hubdat, 2010). Vehicle facilities that often occur are less than 1 millimeter of tire grooves resulting in vehicle skid or tire breaks, brakes failing, metal fatigue resulting in broken vehicle parts, worn equipment not replaced, and various other causes. This is very much related to the technology used and the care done to the vehicle. One of the government's efforts to improve road safety is through safety vehicle action programs such as compliance with vehicle operations, organizing periodic and type test repair procedures, handling overloading, vehicle scrapping, and developing motor vehicle design that aims to improve vehicle safety technology (DG Hubdat, 2013).Keywords:Transportation Performance, User Satisfaction.

scholarly journals User Satisfaction of the Free Shuttle Bus Service in Petaling Jaya

2021 ◽  
Vol 6 (11) ◽  
pp. 427-441
Author(s):  
Nur Adibah Farhanah Binti Ismail ◽  
Nur Alya Imani Binti Ismail ◽  
Nur Intan Faaiqah Binti Mohd Faizal ◽  
Nur Rabiatul Adawiyah Atiqah Binti Ijama ◽  
Nuramira Adiyana Binti Suzeli ◽  
...  
Keyword(s):  
Public Transportation ◽  
Rural Areas ◽  
User Satisfaction ◽  
Quality Of Services ◽  
Survey Questionnaire ◽  
City Bus ◽  
Bus Service ◽  
Urban And Rural Areas ◽  
Bus Services

Public transportation brings more convenience to customer in urban and rural areas. In Malaysia, awareness of using the PJ City bus by passengers in Petaling Jaya is still limited. Many passengers are still unsatisfied with the services provided because the shuttle bus is zero-priced services, so the quality of services are always questioned by access users. Therefore, this current study is to investigate the influences of value, quality and reputation of free shuttle (PJ City) bus services towards customer satisfaction. Understanding what customers expect is very important as it will help to improve the services. Data were collected from users of PJ City bus using a survey questionnaire. The finding further revealed that, value positively influenced the satisfaction of customers. So, it is important for the service provider to enhance its value to the customer.

Selection of wheat breeders' lines for improved baking quality based on their free lipid content

1991 ◽  
Vol 42 (5) ◽  
pp. 715 ◽  
Author(s):  
JF Panozzo ◽  
F Bekes ◽  
L O'Brien ◽  
A Khan
Keyword(s):  
Lipid Content ◽  
Extraction Methods ◽  
Breeding Program ◽  
Lower Amount ◽  
Small Scale ◽  
Loaf Volume ◽  
Baking Quality ◽  
Free Lipid ◽  
Large Numbers ◽  
Wheat Lines

To determine if a relationship exists between the amount of extracted lipid and loaf volume, the free lipid content in wholemeal wheat and flour samples was extracted using n-hexane. Three different extraction methods, classical Soxhlet, a commercial Soxhlet instrument known as the Soxtec and batch extraction at room temperature, were used. The aim was to ascertain which method could best be applied to screen large numbers of wheat lines in a breeding program. The results showed that the Soxhlet and Soxtec methods extracted similar amounts of lipid while the batch method extracted a lower amount. The relationships between loaf volume and free lipid extracted from either flour or wholemeal were highly significant. A protocol for screening wheat lines in a breeding program was developed. When evaluated over 2 years, measurement of free lipid content was sufficiently accurate to be used as a small scale test to select wheat lines for baking quality.

scholarly journals Electric Bicycle-Sharing: A New Competitor in the Urban Transportation Market? An Empirical Analysis of Transaction Data

2019 ◽  
Vol 2673 (4) ◽  
pp. 15-26 ◽  
Author(s):  
Sergio Guidon ◽  
Henrik Becker ◽  
Horace Dediu ◽  
Kay W. Axhausen
Keyword(s):  
Public Transportation ◽  
Spatial Regression ◽  
Social Activity ◽  
Transaction Data ◽  
Fifth Generation ◽  
Transportation Service ◽  
Bike Sharing ◽  
Bicycle Infrastructure ◽  
Electric Bicycle ◽  
Key Drivers

Electric bicycles (e-bikes) are a new addition to bicycle-sharing and may improve its competitiveness. E-bikes allow for higher speeds at a higher level of comfort than conventional bicycles and, compared with traditional bicycle-sharing, e-bike-sharing is better positioned to complement or compete with existing public transportation, or to even challenge established taxi services. In this paper, eight months of transaction data from a free-floating e-bike-sharing system in Zürich, Switzerland, were used to study the market position of e-bike sharing and drivers of demand. The results of the analysis indicate that a large proportion of the trips are commuting, and that the distance range of e-bike-sharing trips overlaps with the distance ranges of traditional public transportation and taxi services. Intensity of use is sensitive to precipitation. Spatial regression modeling indicates that economic and social activity, public transportation service quality, and the availability of bicycle infrastructure are key drivers of demand for free-floating e-bike-sharing. Given the substantial differences in the service compared with traditional bicycle-sharing, a new fifth generation of bicycle-sharing schemes is proposed.

scholarly journals Solving Scheduling Problem in a Distributed Manufacturing System Using a Discrete Fruit Fly Optimization Algorithm

Energies ◽  
2019 ◽  
Vol 12 (17) ◽  
pp. 3260 ◽  
Author(s):  
Zhang ◽  
Liu ◽  
Tang ◽  
Królczyk ◽  
Li
Keyword(s):  
Local Search ◽  
Optimization Algorithm ◽  
Fruit Fly ◽  
Small Scale ◽  
Fruit Fly Optimization Algorithm ◽  
Distributed Manufacturing ◽  
Scheduling Optimization ◽  
Search Methods ◽  
Fruit Fly Optimization ◽  
Local Search Methods

This study attempts to optimize the scheduling decision to save production cost (e.g., energy consumption) in a distributed manufacturing environment that comprises multiple distributed factories and where each factory has one flow shop with blocking constraints. A new scheduling optimization model is developed based on a discrete fruit fly optimization algorithm (DFOA). In this new evolutionary optimization method, three heuristic methods were proposed to initialize the DFOA model with good quality and diversity. In the smell-based search phase of DFOA, four neighborhood structures according to factory reassignment and job sequencing adjustment were designed to help explore a larger solution space. Furthermore, two local search methods were incorporated into the framework of variable neighborhood descent (VND) to enhance exploitation. In the vision-based search phase, an effective update criterion was developed. Hence, the proposed DFOA has a large probability to find an optimal solution to the scheduling optimization problem. Experimental validation was performed to evaluate the effectiveness of the proposed initialization schemes, neighborhood strategy, and local search methods. Additionally, the proposed DFOA was compared with well-known heuristics and metaheuristics on small-scale and large-scale test instances. The analysis results demonstrate that the search and optimization ability of the proposed DFOA is superior to well-known algorithms on precision and convergence.

scholarly journals Ridesourcing and Travel Demand: Potential Effects of Transportation Network Companies in Bogotá

2020 ◽  
Vol 12 (5) ◽  
pp. 1732 ◽  
Author(s):  
Daniel Oviedo ◽  
Isabel Granada ◽  
Daniel Perez-Jaramillo
Keyword(s):  
Public Transportation ◽  
Travel Demand ◽  
Transportation Network ◽  
Open Data ◽  
Primary Data ◽  
Small Scale ◽  
Modal Shift ◽  
Economic Implications ◽  
Before And After ◽  
Transportation Network Companies

This paper proposes a modal-shift analysis methodology based on a mix of small-scale primary data and big data sources to estimate the total amount of trips that are reallocated to transportation network companies (TNCs) services in Bogotá, Colombia. The analysis is focused on the following four modes: public transportation, private vehicles, conventional taxis, and TNC services. Based on a stated preferences survey and secondary databases of travel times and costs, the paper proposes a methodology to estimate the reallocation of travel demand once TNCs start operating. Results suggests that approximately one third of public transportation trips are potentially transferred to TNCs. Moreover, potential taxi and private vehicle–transferred trips account for almost 30% of the new TNC demand. Additionally, approximately half of the trips that are reallocated from public transport demand can be considered as complementary, while the remaining share can be considered as potential replacing trips of public transportation. The paper also estimates the potential increase in Vehicle-km travelled in each of the modes before and after substitution as a proxy to the effects of demand reallocation on sustainability, finding increases between 1.3 and 14.5 times the number of Vehicle-km depending on the mode. The paper highlights the role of open data and critical perspectives on available information to analyze potential scenarios of the introduction of disruptive technologies and their spatial, social, and economic implications.

scholarly journals Heuristic-Based Journey Planner for Mobility as a Service (MaaS)

2020 ◽  
Vol 12 (23) ◽  
pp. 10140
Author(s):  
Panagiotis Georgakis ◽  
Adel Almohammad ◽  
Efthimios Bothos ◽  
Babis Magoutas ◽  
Kostantina Arnaoutaki ◽  
...  
Keyword(s):  
Public Transport ◽  
User Satisfaction ◽  
Methodological Approach ◽  
Central Component ◽  
Successful Implementation ◽  
Transportation Services ◽  
Single Interface ◽  
Transport Services ◽  
Bike Sharing ◽  
Mobility Solution

The continuing growth of urbanisation poses a real threat to the operation of transportation services in large metropolitan areas around the world. As a response, several initiatives that promote public transport and active travelling have emerged in the last few years. Mobility as a Service (MaaS) is one such initiative with the main goal being the provision of a holistic urban mobility solution through a single interface, the MaaS operator. The successful implementation of MaaS requires the support of a technology platform for travellers to fully benefit from the offered transport services. A central component of such a platform is a journey planner with the ability to provide trip options that efficiently integrate the different modes included in a MaaS scheme. This paper presents a heuristic that implements a scenario-based journey planner for users of MaaS. The proposed heuristic provides routes composed of different modes including private cars, public transport, bike-sharing, car-sharing and ride-hailing. The methodological approach for the generation of journeys is explained and its implementation using a microservices architecture is presented. The implemented system was trialled in two European cities and the analysis of user satisfaction results reveal good overall performance.

scholarly journals Leveraging Integrated Bike-Sharing with Existing Bus Rapid Transit (BRT) to Reduce Motor Vehicle in Central Jakarta Municipal

2019 ◽  
Vol 6 (1) ◽  
pp. 13
Author(s):  
Daniella Daniella ◽  
Achmad Amri Dharma Wangsa
Keyword(s):  
Public Transportation ◽  
Motor Vehicle ◽  
Motor Vehicles ◽  
Walking Distance ◽  
Bus Rapid Transit ◽  
Rapid Transit ◽  
Transportation Mode ◽  
Smart Transportation ◽  
Bike Sharing ◽  
The Government

Jakarta is one of the most congested cities in the world due to a plethora of motor vehicles used in the city. One of the government actions to address the issue is by implementing Bus Rapid Transit (BRT) as an alternative public transportation mode. However, according to the convenience walking distance standard, the BRT coverage the inhabitant to choose motor vehicle rather than walking. This paper purposes Bike-Sharing as the smart transportation mode to overcome such issue and predict the three potential places to establish sharing-bike stations according to the convenience walking distance standard. In this paper the walking distance is classified into 100 mater range (300 meter, 400 meter and 500 meter) projected using the euclidean distance principle. As the result for 300 meter standard, there are 809 potential bike-sharing stations consist of 164 main stations and 645 feeder stations, while the 400 meter standard needs 541 potential stations with 140 stations serve the BRT station directly and 401 stations as the feeder. Furthemore, with 500 meter standard, 359 stations consist of 131 main stations and 228 feeder stations is needed.

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