An ideal mode for public transportation in the future-exclusive road network of transit under intellectual management

2002 ◽  
Author(s):  
Dianhai Wang ◽  
Hongqiang Li ◽  
Jianzhi Wang
Keyword(s):  
Public Transportation ◽  
Road Network ◽  
The Future

Simulating individual work trips for transit-facilitated accessibility study

2017 ◽  
Vol 46 (1) ◽  
pp. 84-102 ◽  
Author(s):  
Ruihong Huang
Keyword(s):  
Inner City ◽  
Public Transportation ◽  
Road Network ◽  
Agent Based ◽  
Census Tracts ◽  
Transit Network ◽  
Demographic Profiles ◽  
Individual Work ◽  
Job Opportunities

To measure job accessibility, person-based approaches have the advantage to capture all accessibility components: land use, transportation system, individual’s mobility and travel preference, as well as individual’s space and time constraints. This makes person-based approaches more favorable than traditional aggregated approaches in recent years. However, person-based accessibility measures require detailed individual trip data which are very difficult and expensive to acquire, especially at large scales. In addition, traveling by public transportation is a highly time sensitive activity, which can hardly be handled by traditional accessibility measures. This paper presents an agent-based model for simulating individual work trips in hoping to provide an alternative or supplementary solution to person-based accessibility study. In the model, population is simulated as three levels of agents: census tracts, households, and individual workers. And job opportunities (businesses) are simulated as employer agents. Census tract agents have the ability to generate household and worker agents based on their demographic profiles and a road network. Worker agents are the most active agents that can search jobs and find the best paths for commuting. Employer agents can estimate the number of transit-dependent employees, hire workers, and update vacancies. A case study is conducted in the Milwaukee metropolitan area in Wisconsin. Several person-based accessibility measures are computed based on simulated trips, which disclose low accessibility inner city neighborhoods well covered by a transit network.

scholarly journals Optimization of Evacuation and Walking-Home Routes from Osaka City After a Nankai Megathrust Earthquake Using Road Network Big Data

2021 ◽  
pp. 369-389
Author(s):  
Atsushi Takizawa ◽  
Yutaka Kawagishi
Keyword(s):  
Big Data ◽  
Public Transportation ◽  
Urban Areas ◽  
Road Network ◽  
Large Earthquake ◽  
The Road ◽  
Return Home ◽  
Flooded Area ◽  
Network Big Data ◽  
Surrounding Areas

AbstractWhen a disaster such as a large earthquake occurs, the resulting breakdown in public transportation leaves urban areas with many people who are struggling to return home. With people from various surrounding areas gathered in the city, unusually heavy congestion may occur on the roads when the commuters start to return home all at once on foot. In this chapter, it is assumed that a large earthquake caused by the Nankai Trough occurs at 2 p.m. on a weekday in Osaka City, where there are many commuters. We then assume a scenario in which evacuation from a resulting tsunami is carried out in the flooded area and people return home on foot in the other areas. At this time, evacuation and returning-home routes with the shortest possible travel times are obtained by solving the evacuation planning problem. However, the road network big data for Osaka City make such optimization difficult. Therefore, we propose methods for simplifying the large network while keeping those properties necessary for solving the optimization problem and then recovering the network. The obtained routes are then verified by large-scale pedestrian simulation, and the effect of the optimization is verified.

scholarly journals Impact of Road Network Topology on Public Transportation Development

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Minzhi Chen ◽  
Fan Wu ◽  
Min Yin ◽  
Jiangang Xu
Keyword(s):  
Public Transportation ◽  
Road Network ◽  
Road Networks ◽  
Urban Road Network ◽  
Urban Road ◽  
The Road ◽  
Layout Structure ◽  
Per Capita ◽  
Transportation Development ◽  
The Impact

Planning of road networks is fundamental for public transportation. The impact of road network density on public transportation has been extensively studied, but few studies in this regard involved evaluation indicators for connectivity and layout of road networks. With 29 cities in China as the study cases, this paper quantifies the layout structure of the road network based on the network’s betweenness centralization and establishes a multivariate linear regression model to perform regression of the logarithm of the frequency of per capita public transportation on betweenness centralization. It is found in the present work that there is a significant correlation between the layout structure of an urban road network and the residents’ utilization degree of public transportation. A greater betweenness centralization of the urban road network, namely a more centralized road network, means a higher frequency of per capita public transportation of urban residents and a higher degree of the residents’ utilization of public transportation. In the development of public transportation, centralized and axial-shaped layout structures of road networks can be promoted to improve the utilization of public transportation.

Internet of Things and the economics of smart sustainable cities

2017 ◽  
Vol 18 (1-2) ◽  
pp. 115-131 ◽  
Author(s):  
Günter Knieps
Keyword(s):  
Public Transportation ◽  
Smart City ◽  
Smart Cities ◽  
Packet Transmission ◽  
Information And Communications Technology ◽  
Global Navigation Satellite Systems ◽  
Wastewater Management ◽  
Virtual Networks ◽  
The Future

The major objective of this article is to analyze the potentials of information and communications technology (ICT) for the evolution of smart cities, with a particular focus on the challenges faced by traditional public utilities in the areas of public transportation, energy, water supply, and wastewater management due to the entry of new players originating from ICT organizations and industries. The character of virtual networks for smart cities is demonstrated based on three pillars: (1) All-IP–based real-time and adaptive broadband communication networks, (2) global navigation satellite systems and their overlay position correction networks, and (3) the interoperability of ubiquitous sensor network applications, as they form the ICT basis for a multitude of applications that are important in smart cities. The heterogeneity of virtual networks for different smart city physical network services is based on these pillars, taking into account the different requirements for the quality of service (QoS) of data packet transmission, geopositioning, and sensor networks. It can be expected that prosumer activities and resultant networked commons become increasingly relevant for the smart city of the future. However, the increasing role of prosumer activities cannot replace the role of markets in solving scarcity problems within ICT networks as well as physical networks. The role of congestion pricing and QoS differentiation for network capacities in transportation and electricity markets as well as ICT is indicated. If, due to non-rivalry in usage, efficient congestion prices are pointless, the future role of subsidies from the state is considered.

scholarly journals Automatic generation of road network data from taxi GPS trajectories

2021 ◽  
Author(s):  
Alborz Soltankhah-Bidkhti
Keyword(s):  
Public Transportation ◽  
Road Network ◽  
Automatic Generation ◽  
Geographical Information ◽  
Gps Data ◽  
Time Intervals ◽  
Field Surveys ◽  
Gis Applications ◽  
Gps Trajectories ◽  
Road Maps

Keeping road network databases up-to-date is crucial to Geographical Information System (GIS) applications such as road networking. The vector road centerlines extracted from field surveys and satellite images are expensive and labor intensive with long updating processes. The GPS data crowd-sourced by public transportation users, provides an expanding source for enhancing road maps because of its rich spatial-temporal coverage and reasonable level of accuracy. The overall objective of this project is to implement an optimized methodology, which generates road centerline from GPS data obtained from taxis in Beijing without using any reference plans. Since the dataset used in this project has longer time intervals between trajectories compared to previous studies, the extracted road network on straight road segments are more accurate than the extracted road network on highway ramps in this project.

scholarly journals The use of autonomous vehicles in transportation

Tehnika ◽  
2021 ◽  
Vol 76 (2) ◽  
pp. 171-177
Author(s):  
Jelena Pisarov ◽  
Gyula Mester
Keyword(s):  
Public Transportation ◽  
Autonomous Vehicles ◽  
Testing Methods ◽  
The World ◽  
The Future ◽  
Delivery Vehicles

The objective of this paper is to examine the types of autonomous vehicles already employed in transportation. It exemplifies the segments of transportation which already use autonomous vehicles. This paper gives an insight of the places in the world where autonomous vehicles are put in use. Furthermore, companies such as Volvo, Volkswagen, Airbus and WAYMO have showed their models of driverless vehicles ranging from trucks, buses, shuttles and helicopters. Moreover, the paper provides a description, testing methods, use and features of the each vehicle presented. In short, this paper aims to raise consciousness about the future of not just public transportation but also transportation of any other type such as good's transportation, delivery, vehicles provided for sightseeing, aircrafts etc.

scholarly journals The Safety of Sea Ferry Transportation and Anticipation of Ship Accidents in Merak-Bakauheni

2021 ◽  
Author(s):  
Muhammad Fathoni ◽  
Oktarina Hidayati ◽  
Devina Arifani
Keyword(s):  
Economic Growth ◽  
Public Transportation ◽  
Safety Standard ◽  
Safety Standards ◽  
Daily Routines ◽  
Expected Result ◽  
The Future ◽  
Smooth Movement

The Merak-Bakauheni Ferry Port is a connecting route between Java and Sumatra. With its role as a driver of economic growth between islands, it is hoped that the smooth movement of passengers and goods can take place effectively and efficiently. Research on the ferries at the Merak-Bakauheni route is carried out to analyse the movement of people and goods based on the time of service, the number of ferry boats, and the number of docks, so that changes can be implemented to ensure the ferry service is fast, precise, safe, and comfortable. Public transportation in the current era is a very important necessity for every community in supporting all activities and daily routines, PT. ASDP Indonesia Ferry Persero as a ferry operator plays an important role in organizing proper public transportation in our country. The main problem identified by this research is the absence of a safety standard for sea ferries transportation. The expected result with this research is to be able to take inventory of safety standards and to anticipate the extent of safety on the ferry so that recommendations can be formulated to prevent accidents in the future. Keywords: Ferry, Safety, Sea Ferries

scholarly journals Implementation of Connected and Autonomous Vehicles in Cities Could Have Neutral Effects on the Total Travel Time Costs: Modeling and Analysis for a Circular City

2019 ◽  
Vol 11 (2) ◽  
pp. 482 ◽  
Author(s):  
Marcos Medina-Tapia ◽  
Francesc Robusté
Keyword(s):  
Travel Time ◽  
Public Transportation ◽  
Indirect Effects ◽  
Autonomous Vehicles ◽  
City Planning ◽  
City Size ◽  
Future Scenario ◽  
Positive Effects ◽  
Time Costs ◽  
The Future

Autonomous vehicles promise to revolutionize the automobile market, although their implementation could take several decades in which both types of cars will coexist on the streets. We formulate a model for a circular city based on continuous approximations, considering demand surfaces over the city. Numerical results from our model predict direct and indirect effects of connected and autonomous vehicles. Direct effects will be positive for our cities: (a) less street supply is needed to accommodate the traffic; (b) congestion levels decrease: travel costs may decrease by 30%. Some indirect effects will counterbalance these positive effects: (c) a decrease of 20% in the value of travel time can reduce the total cost by a third; (d) induced demand could be as high as 50%, bringing equivalent total costs in the future scenario; (e) the vehicle-kilometers traveled could also affect the future scenario; and (f) increases in city size and urban sprawl. As a conclusion, the implementation of autonomous vehicles could be neutral for the cities regarding travel time costs. City planning agencies still have to promote complementary modes such as active mobility (walking and bicycle), transit (public transportation), and shared mobility (shared autonomous vehicles and mobility as a service).

Circular Bus Network Planning Method in Chessboard-Shaped Road Network

2012 ◽  
Vol 209-211 ◽  
pp. 730-734 ◽  
Author(s):  
Qi Chen ◽  
Qing Lu
Keyword(s):  
Objective Function ◽  
Public Transportation ◽  
Road Network ◽  
Transportation Network ◽  
Network Planning ◽  
Large Degree ◽  
Planning Method ◽  
Linear Coefficient ◽  
The Status ◽  
Bus Network

Bus routes planning is the key to the design of public transport system, it determines the status of public transports at a large degree. For the existing bus network traffic problems, such as bus traffic is not balanced in both pace and time, flat-peak conversion is slow, non-linear coefficient is high. Therefore a circular bus network planning method is put out. The overall interests of passenger and bus operators are used as the objective function; the public transportation network technical indicators are used as the constraint conditions. When designing the network, the transfer coefficient and the line length are used for the control conditions. The main through passenger is satisfied at first, and the initial network is laid out by the circular line. Then the bus network is revised according to the constraints conditions with the status of the road network. From the different purposes, different option should be compared by the value of objective function, and the optimal one is gained at last.

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