scholarly journals Comparative Analysis of Spatial–Temporal Distribution between Traditional Taxi Service and Emerging Ride-Hailing

2021 ◽  
Vol 10 (10) ◽  
pp. 690
Author(s):  
Di Wang ◽  
Tomio Miwa ◽  
Takayuki Morikawa
Keyword(s):  
Travel Demand ◽  
Temporal Distribution ◽  
Analytical Framework ◽  
Statistical Characteristics ◽  
Real Field ◽  
Tensor Factorization ◽  
Personal Mobility ◽  
Urban Structures ◽  
Taxi Service ◽  
Taxi Industry

The paradigms of taxis and ride-hailing, the two major players in the personal mobility market, are compared systematically and empirically in a unified spatial–temporal context. Supported by real field data from Xiamen, China, this research proposes a three-fold analytical framework to compare their mobilities, including (1) the spatial distributions of departures and arrivals by rank–size and odds ratio analysis, (2) the statistical characteristics of trip distances by spatial statistics and considering distance-decay effect, and (3) the meta-patterns inherent in the mobility processes by nonnegative tensor factorization. Our findings suggest that taxis and ride-hailing services share similar spatial patterns in terms of travel demand, but taxi demand heterogenizes more quickly with changes in population density. Additionally, the relative balance between the taxi industry and ride-hailing services shows opposite trends inside and outside Xiamen Island. Although the trip distances have similar statistical properties, the spatial distribution of the median trip distances reflects different urban structures. The meta-patterns detected from the origin–destination-time system via tensor factorization suggest that taxi mobilities feature exclusive nighttime intensities, whereas ride-hailing exhibits more prominent morning peaks on weekdays. Although ride-hailing contributes significantly to cross–strait interactions during daytime, there is a lack of efficient services to maintain such interactions at night.

scholarly journals Modelling the Impact of Mobile Application Adoption on the Taxi Demand: An Application of a System Dynamics Approach

2021 ◽  
Vol 15 (06) ◽  
pp. 18
Author(s):  
Muhamad Syafiq Abdul Ghani ◽  
Norhaslinda Zainal Abidin ◽  
Rosshairy Abd Rahman ◽  
Antoni Wibowo ◽  
Azatuliffah Alwi
Keyword(s):  
System Dynamics ◽  
Mobile Application ◽  
Travel Demand ◽  
Unintended Consequences ◽  
Mode Share ◽  
Taxi Service ◽  
The Government ◽  
Taxi Industry ◽  
The Impact ◽  
Sd Model

<p>The improvement of technology brings a significant impact on transportation industries. The taxi industry has undergone tremendous changes with the existent of e-hailing service in the industry. Due to the introduction of mobile applications, e-hailing service takes part to compete in the market. The government has given priority to overcome the problem by introducing travel demand strategies that focus on mitigating the demand competition between the taxi and e-hailing services. One of the strategies is the adoption of a mobile application in taxi service. This paper aims to develop a system dynamics model to analyse mobile application adoption’s impact on customers’ demand on the mode share of taxi and e-hailing services as a measured output. System dynamics is a decision-experimentation method that creates a learning environment in which policymakers gain a better understanding of how the system will respond to their decisions and the potential unintended consequences of decisions. With the developed SD model, the feedback relations between mobile application adoptions on the output of taxi demand can be observed. Furthermore, the demand competition between the taxi and e-hailing services can be minimised using this SD model. The result shows that, by implementing the usage of the mobile application in taxi services, more users will be attracted to use the taxi service. With that service option, users will shift their attraction from e-hailing to taxi service, which is then able to minimise the demand competition. This research can benefit policymakers and authorities in the department of transportation to serve as a planning tool so that the demand of taxi and e-hailing services in Malaysia with the adoption of mobile application in taxi service can be predicted.</p>

The Study of Differential Pricing Model in Market of Urban Taxi Industry Based on the Zoning Service

2014 ◽  
Vol 587-589 ◽  
pp. 1932-1939
Author(s):  
Qi Yuan Liu ◽  
Liang Jie Xu ◽  
Dan Ying
Keyword(s):  
Load Ratio ◽  
Return Rate ◽  
Pricing Model ◽  
Trip Distribution ◽  
Model Based ◽  
Taxi Service ◽  
Differential Pricing ◽  
The Difference ◽  
Taxi Industry ◽  
Negative Phenomena

In some cities, the zoning operation in taxi service leads to the difference in load ratio and empty return rate in their limited zones. Therefore, some negative phenomena appear such as the instability of drivers’ income and drivers negotiate the price without taximeter. In order to keep a balance between enhancing the drivers’ profit and protecting the passengers’ interests, establishing a differential pricing model based on the characteristics of taxi service in different zones. The operation areas, trip intensity and trip distribution have been taken into consideration about different taxi service zones in the model.

scholarly journals Modeling the implications of stock mixing and life history uncertainty of Atlantic bluefin tuna

2017 ◽  
Vol 74 (11) ◽  
pp. 1990-2004 ◽  
Author(s):  
Lisa A. Kerr ◽  
Steven X. Cadrin ◽  
David H. Secor ◽  
Nathan G. Taylor
Keyword(s):  
Temporal Distribution ◽  
Bluefin Tuna ◽  
Analytical Framework ◽  
Magnitude Distribution ◽  
Atlantic Bluefin Tuna ◽  
Age Structured ◽  
Stock Mixing ◽  
Overlap Model ◽  
Mixed Stock ◽  
Central Atlantic

Atlantic bluefin tuna (Thunnus thynnus) is currently managed as two separate eastern and western stocks, despite information indicating considerable stock mixing. Using a simulation model, we explored how scenarios of population-specific migration and uncertainty in aspects of bluefin tuna biology affect the magnitude, distribution, and mixed stock nature of the resource and catch of its associated fisheries. The analytical framework was a stochastic, age-structured, stock-overlap model that was seasonally and spatially explicit with movement of eastern- and western-origin tuna informed by tagging and otolith chemistry data. Alternate estimates of movement and assumptions regarding maturity and recruitment regime for western-origin fish were considered. Simulation of the operating model indicated considerable stock mixing in the western and central Atlantic, which resulted in differences between the stock and population view of western bluefin tuna. The relative biomass of the western population and its spatial and temporal distribution in the Atlantic was sensitive to model assumptions and configurations. Simulation modeling can provide a means to ascertain the potential consequences of stock mixing on the assessment and management of fishery resources.

scholarly journals Modelling the Modal Shift Effects of Converting a General Traffic Lane into a Dedicated Bus Lane

2020 ◽  
Vol 32 (5) ◽  
pp. 625-637
Author(s):  
Guangchuan Yang ◽  
Daobin Wang ◽  
Xuesong Mao
Keyword(s):  
Travel Demand ◽  
Demand Management ◽  
Analytical Framework ◽  
Modal Shift ◽  
Transportation Demand ◽  
Traffic Lane ◽  
Car Traffic ◽  
Significant Difference ◽  
Bus Delay ◽  
Bus Lane

This paper presents an analytical framework for evaluating the performance of dedicated bus lanes. It assumes that under a designated travel demand, the traffic volume on a corridor changes with the modal shifts. The modal shift affects the operations of both bus traffic and car traffic and eventually, an equilibrium bus share ratio that maximizes the performance of the corridor will be reached. Microsimulation modelling is employed to assess the traffic operations under various demand levels and bus share ratios. The results show that converting a general lane into a bus lane significantly reduces bus delay. For car traffic, the overall trend is that delay increases after converting a general lane to a bus lane. In addition, delay decreases with the increase of bus share ratio. Nevertheless, when bus share ratio reaches 0.6 (demand less than 10,000 passengers per hour, pph; or 0.8 when demand increases up to 14,000 pph), there is no significant difference in delay between the two scenarios. The identified bus share ratios have the potential to direct the development of bus lane warrants. Finally, this research recommends that the Transportation Demand Management (TDM) strategies shall be developed to stimulate the modal shifts towards the identified optimal bus share ratio.

Issues in Fare Policy: Case of the New York Taxi Industry

1998 ◽  
Vol 1618 (1) ◽  
pp. 139-142 ◽  
Author(s):  
Bruce Schaller
Keyword(s):  
New York ◽  
Service Quality ◽  
Regulatory Action ◽  
Service Availability ◽  
Political Forces ◽  
The Face ◽  
Taxi Service ◽  
Taxi Industry

Setting taxi fares is one of the most delicate and difficult tasks faced by taxi regulators. Fare setting is delicate because political forces are strong on both sides of the issue. The difficulties lie in reliably determining taxi costs and revenues and how a fare increase will affect service quality. Major issues commonly raised in connection with fare policy are considered, including the goals of fare changes, the relevance of medallion prices, and implications for service availability. It is concluded that fare increases can achieve their goal of increasing revenues to the taxi industry but that additional regulatory action is required to ensure improvements to driver and vehicle quality. Arguments that fare increases are unnecessary in the face of high medallion prices are shown to be impractical and possibly counterproductive. Finally, it is argued that fare increases expand the availability of taxi service and that availability considerations should be an integral part of fare policy.

INTER-INDUSTRY COMPETITION PRESSURES: THE MODEL, MEASUREMENT AND STATISTICAL CHARACTERISTICS

2021 ◽  
pp. 1-21
Author(s):  
CHUANFENG HUANG ◽  
RONG WANG ◽  
YAQIN SONG ◽  
PEIYU FENG
Keyword(s):  
Resource Competition ◽  
Market Competition ◽  
Analytical Framework ◽  
Statistical Characteristics ◽  
Two Dimensional ◽  
Output Analysis ◽  
Input Output Analysis ◽  
Industry Competition ◽  
Structural Nature ◽  
Model Measurement

This paper proposes a two-dimensional conceptual model of inter-industry competitive pressure, which is constituted of resource competition and market competition. This paper also provides the related measurement method and some basic properties based on the perspective of input–output analysis. Empirical research in the U.S. clearly shows that these pressures obey a lognormal distribution with a power-law tail, and the proportions of the two-dimensional competitive components follow a normal distribution. This analytical framework can be used to explore the structural nature, statistical characteristics and evolutionary mechanism of the regional industrial competition system and provides some decision support for industry competition policies.

scholarly journals Modeling of Evaporation-Driven Multiple Salt Precipitation in Porous Media with a Real Field Application

Geosciences ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 395 ◽  
Author(s):  
Emna Mejri ◽  
Rainer Helmig ◽  
Rachida Bouhlila
Keyword(s):  
Temporal Distribution ◽  
Climatic Conditions ◽  
Field Application ◽  
Real Field ◽  
Extended Model ◽  
Salt Precipitation ◽  
Climate Conditions ◽  
Palm Trees ◽  
Spatio Temporal ◽  
The One

Soil and groundwater salinization are very important environmental issues of global concern. They threaten mainly the arid and semiarid regions characterized by dry climate conditions and an increase of irrigation practices. Among these regions, the south of Tunisia is considered, on the one hand, to be a salt-affected zone facing a twofold problem: The scarcity of water resources and the degradation of their quality due to the overexploitation of the aquifers for irrigation needs. On the other hand, this Tunisian landform is the only adequate area for planting date palm trees which provide the country with the first and most important exportation product. In order to maintain the existence of these oases and develop the date production, a good understanding of the salinization problem threatening this region, and the ability to predict its distribution and evolution, should not be underestimated. The work presented in this paper deals with the Oasis of Segdoud in southern Tunisia, with the objective of modeling the evaporation-driven salt precipitation processes at the soil profile scale and under real climatic conditions. The model used is based on the one developed and presented in a previous work. In order to fulfil the real field conditions, a further extension of the geochemical system of the existing model was required. The precipitated salts considered in this work were halite (NaCl), gypsum (CaSO4) and thenardite (Na2SO4). The extended model reproduces very well the same tendencies of the physico-chemical processes of the natural system in terms of the spatio-temporal distribution and evolution of the evaporation and multiple-salt precipitation. It sheds new lights on the simulation of sequences of salt precipitation in arid regions. The simulation results provide an analysis of the influence of salt precipitation on hydrodynamic properties of the porous medium (porosity and permeability). Moreover, the sensitivity analysis done here reveals the influence of the water table level on the evaporation rate.

scholarly journals Nonisotropic Scattering Characteristic in an Alternant Tree-Blocked Viaduct Scenario on High-Speed Railway at 2.35 GHz

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Rongchen Sun ◽  
Cheng Tao ◽  
Liu Liu ◽  
Zhenhui Tan ◽  
Lingwen Zhang ◽  
...  
Keyword(s):  
High Speed ◽  
Channel Model ◽  
Radio Channel ◽  
Statistical Characteristics ◽  
Real Field ◽  
Line Of Sight ◽  
Angle Of Arrival ◽  
High Speed Railway ◽  
Scattering Characteristic ◽  
Nonisotropic Scattering

This paper presents the nonisotropic scattering characteristic of the mobile radio channel in an alternant tree-blocked viaduct scenario on high-speed railway (HSR) by real field measuring at 2.35 GHz. An angle of arrival (AOA) probability density function (PDF) is proposed for the nonuniform AOA at the mobile caused by stochastically distributed scatterers. Two Von Mises angular distributions with broad applicability are used to represent the line of sight (LOS) component and part of the scattering component in the AOA model. Based on such a PDF statistical characteristics of Ricean factor,κ, and AOA of the scattering component are modeled in LOS and obstructed line of sight (OLOS) cases, respectively. The results may give a meaningful and accurate channel model and could be utilized in HSR viaduct scenario evaluation.

Modeling Hazard and Threat Risks to Populations Surrounding Public-Use, Non-Towered Airports due to General Aviation Operations

2013 ◽  
Author(s):  
Christian Salmon ◽  
Vahid Motevalli
Keyword(s):  
Travel Demand ◽  
Transportation Network ◽  
High Volume ◽  
General Aviation ◽  
Air Traffic Controller ◽  
Commercial Aviation ◽  
Business Plans ◽  
Scarce Resources ◽  
Taxi Industry ◽  
Aviation Operations

This paper considers the potential future wherein the General Aviation (GA) infrastructure of airports and aircraft becomes an integral part of the commercial aviation transportation network. Further, this paper discusses inherent individual and societal risks sourced in the very characteristic that makes the GA infrastructure attractive: accessibility and ubiquity. Air traffic controller furloughs, mergers, surface transportation congestion and infrastructure degradation are a few examples of system discontinuities that have led to increased travel time for short and medium air travel (200–500 miles). These, amongst other constraints, are drivers of various initiatives that seek to mitigate these delays via transfer of travel demand from larger towered airport infrastructure to the General Aviation infrastructure via development of aircraft, business plans, operation oversight processes. An example being the nascent air taxi industry coupled with the development of the Very Light Jet designed to operate on 3,000 ft runways. The development of High Volume Operations (HVO) capability in the GA infrastructure (specifically non-towered airports) will subsequently increase risks to communities situated in the vicinity of GA airports via increased potential for accidents. Modeling and understanding these inherent risks in is important if public safety and negative reaction to operational changes, particularly at community airports, is to be avoided; a negative public opinion that could forestall the development of HVO. Similarly, the potential for security threats (i.e. use of aircraft as a missile) from unsecured community airports are greater, but qualitatively less severe than TSA regulated commercial airports. With the potential of 4,000+ additional airports being added to the national commercial air transportation infrastructure, a risk-based allocation of security resources would need to be implemented for efficient allocation of scarce resources.

Sign in / Sign up

Export Citation Format

Share Document