Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Urban Studies (15)
- Physical Sciences and Mathematics (6)
- Computer Sciences (4)
- Urban Studies and Planning (4)
- Artificial Intelligence and Robotics (2)
-
- Asian Studies (2)
- Business (2)
- Environmental Sciences (2)
- Graphics and Human Computer Interfaces (2)
- International and Area Studies (2)
- Arts and Humanities (1)
- Economics (1)
- Geographic Information Sciences (1)
- Geography (1)
- History (1)
- Operations and Supply Chain Management (1)
- Technology and Innovation (1)
- Keyword
-
- Built environment (5)
- E-scooter (3)
- E-scooters (3)
- Transit desert (3)
- Transportation equity (3)
-
- Big data (2)
- Electric vehicle (2)
- Extreme heat (2)
- GIS (2)
- Heat perception (2)
- Housing (2)
- Human biometeorlogy (2)
- Network effects (2)
- Outdoor thermal comfort (2)
- Public transit infrastructure (2)
- Public transportation (2)
- Urban climate (2)
- Urban design (2)
- Access mode choice (1)
- Accident (1)
- Artificial intelligence (1)
- Automated/autonomous/connected vehicles (1)
- Bicycling (1)
- Bike-share station usage (1)
- COVID-19 (1)
- Car-following (1)
- China (1)
- Climate (1)
- Computer vision (1)
- Crowdsourcing (1)
Articles 1 - 29 of 29
Full-Text Articles in Transportation
Weather Rescue At Sea: Recovering Historical Weather Observations From 19th Century British Naval Ships, Praveen Teleti, Ed Hawkins, Clive Wilkinson
Weather Rescue At Sea: Recovering Historical Weather Observations From 19th Century British Naval Ships, Praveen Teleti, Ed Hawkins, Clive Wilkinson
Research Collection College of Integrative Studies
Ship logbooks represent a critical source of historical meteorological data, providing valuable observations of barometric pressure, air temperature, sea surface temperature, wind force and direction, and other variables. Substantial quantities of these records are unavailable to climate science as they have not yet been transcribed. We present ‘Weather Rescue at Sea’, a citizen-science project which transcribed millions of weather observations contained in 19th Century UK Royal Navy ship logbooks. We describe the logbook structure and weather observation-taking instructions and discuss significant challenges with the translation of handwritten text into accurate data due to errors arising from ambiguous handwriting, historical terminology, …
Hlcg: A Hierarchical Lane-Changing Gaming Decision Model For Heterogeneous Traffic Flow On Two-Lane Highways, Tianyi Wang, Chong He, Hao Li, Yixuan Li, Yiming Xu, Yangyang Wang, Junfeng Jiao
Hlcg: A Hierarchical Lane-Changing Gaming Decision Model For Heterogeneous Traffic Flow On Two-Lane Highways, Tianyi Wang, Chong He, Hao Li, Yixuan Li, Yiming Xu, Yangyang Wang, Junfeng Jiao
Research Collection College of Integrative Studies
Discretionary lane-changing behavior is one of the most common highway operations, which seriously affects traffic efficiency and safety. Nowadays, connected and automated vehicles (CAVs) are advancing rapidly, though not yet fully widespread. As a result, a mixed traffic environment with traditional human-driven vehicles (HDVs) and CAVs will persist for the foreseeable future. To achieve effective automatic lane-changing maneuvers, it’s necessary to propose a lane-changing decision model for heterogeneous traffic flow on two-lane highways. This paper firstly extends longitudinal car-following models based on the intelligent driver model and lateral lane-changing models using quintic polynomial curves to accommodate heterogeneous traffic flow, and …
Built Environment And Public Electric Vehicle Charging: An Investigation Using Poi Data And Computer Vision, Junfeng Jiao, Seung Jun Choi
Built Environment And Public Electric Vehicle Charging: An Investigation Using Poi Data And Computer Vision, Junfeng Jiao, Seung Jun Choi
Research Collection College of Integrative Studies
Public electric vehicle charging stations (EVCSs) are vital for boosting EV adoption. This study investigates Seoul’s public EV charging patterns, taking into account the surrounding urban built environment. We collected built-environment data from land-use maps, Point of Interest (POI) data, and panorama images near public EVCS. The computer-vision technique was used to extract scene features from panorama images. We conducted a spatiotemporal analysis of public EVCS usage. The built-environment factors underwent dimensionality reduction and were assessed for outliers. Descriptive analysis revealed afternoon peak charging times and variations between chargers. Additional peaks are observed in the weekday late evening for chargers …
Analysis Of Access And Egress Mode Choice To High-Speed Railway Stations, Jiaoe Wang, Yongling Li, Junfeng Jiao
Analysis Of Access And Egress Mode Choice To High-Speed Railway Stations, Jiaoe Wang, Yongling Li, Junfeng Jiao
Research Collection College of Integrative Studies
High-speed railway (HSR) has become a key mode for short- to medium-haul transportation intercity trips in China and has been regarded as a competitor to air transportation. While significant research has explored daily travel mode choices and access/egress modes for other intercity transport hubs, the factors influencing access and egress to HSR stations – particularly those related to the built environment – remain underexamined. This paper analyses access/egress mode choices for intercity travel along the Beijing-Shanghai HSR corridor using 2015 survey data. The findings show that, during the access stage, the number of bus stations at HSR stations reduces car …
Uncovering Electric Vehicle Ownership Disparities Using K-Means Clustering Analysis: A Case Study Of Austin, Texas, Seung Jun Choi, Junfeng Jiao
Uncovering Electric Vehicle Ownership Disparities Using K-Means Clustering Analysis: A Case Study Of Austin, Texas, Seung Jun Choi, Junfeng Jiao
Research Collection College of Integrative Studies
Transportation electrification is promoted for its environmental and energy efficiency benefits. However, recent studies examining electric vehicle (EV) adoption have revealed complex patterns influenced by race and income disparities. These studies, primarily based on surveys, often overlook regional ownership variations and built environment measures linked to urban form. Our study addresses this gap by analyzing actual EV registration data with spatial details using hot spot and K-means clustering analyses. The analysis results revealed a pronounced East–West divide in EV adoption. In West Austin, clusters indicate a higher number of EVs, greater energy consumption, and residents who are predominantly White, with …
Toward Equitable Micromobility: Lessons From Austin E-Scooter Sharing Program, Shunhua Bai, Junfeng Jiao
Toward Equitable Micromobility: Lessons From Austin E-Scooter Sharing Program, Shunhua Bai, Junfeng Jiao
Research Collection College of Integrative Studies
This study revealed the inequitable societal impacts of E-scooters on disadvantaged populations. The study conducted a population distribution analysis to compare the use opportunities and space intrusion burdens of E-scooter sharing on four vulnerable population groups in Austin, Texas. Nearly all minority population experienced fewer E-scooter use opportunities. Ten percent of the minority population waited for a disproportionately longer time before a disturbance could be resolved. Ten percent of the low-income population were in a disadvantaged position in high opportunities and moderate burdens. Twenty percent of the physically disabled population faced more moderate-level burdens. The result did not show significant …
Measurement Of Regional Electric Vehicle Adoption Using Multiagent Deep Reinforcement Learning, Seung Jun Choi, Junfeng Jiao
Measurement Of Regional Electric Vehicle Adoption Using Multiagent Deep Reinforcement Learning, Seung Jun Choi, Junfeng Jiao
Research Collection College of Integrative Studies
This study explores the socioeconomic disparities observed in the early adoption of Electric Vehicles (EVs) in the United States. A multiagent deep reinforcement learning-based policy simulator was developed to address the disparities. The model, tested using data from Austin, Texas, indicates that neighborhoods with higher incomes and a predominantly White demographic are leading in EV adoption. To help low-income communities keep pace, we introduced tiered subsidies and incrementally increased their amounts. In our environment, with the reward and policy design implemented, the adoption gap began to narrow when the incentive was equivalent to an increase in promotion from 20% to …
Trust: The Feature That Vending Machines And Atms Share, But Simplygo Lacks, Sun Sun Lim
Trust: The Feature That Vending Machines And Atms Share, But Simplygo Lacks, Sun Sun Lim
Research Collection College of Integrative Studies
The article discussed the intricacies of trust in the SimplyGo debacle and highlighted how the design of physical interfaces like vending machines and ATMs and digital interfaces from apps like Grab, Parking.sg and ShopBack have critical features to instil trust. People need to be reassured that their transactions have proceeded as they should, and thay have not been short-changed.
Forecasting Traffic Speed During Daytime From Google Street View Images Using Deep Learning, Junfeng Jiao, Huihai Wang
Forecasting Traffic Speed During Daytime From Google Street View Images Using Deep Learning, Junfeng Jiao, Huihai Wang
Research Collection College of Integrative Studies
Traffic forecasting plays an important role in urban planning. Deep learning methods outperform traditional traffic flow forecasting models because of their ability to capture spatiotemporal characteristics of traffic conditions. However, these methods require high-quality historical traffic data, which can be both difficult to acquire and non-comprehensive, making it hard to predict traffic flows at the city scale. To resolve this problem, we implemented a deep learning method, SceneGCN, to forecast traffic speed at the city scale. The model involves two steps: firstly, scene features are extracted from Google Street View (GSV) images for each road segment using pretrained Resnet18 models. …
Durations Of Dockless E-Scooter Trips Before And During The Covid-19 Pandemic In Austin, Tx: An Analysis Using Hazard-Based Duration Models, Amin Azimian, Junfeng Jiao
Durations Of Dockless E-Scooter Trips Before And During The Covid-19 Pandemic In Austin, Tx: An Analysis Using Hazard-Based Duration Models, Amin Azimian, Junfeng Jiao
Research Collection College of Integrative Studies
The pandemic arising from the 2019 coronavirus disease has significantly affected all facets of human life across the world, including economies and transportation systems, thereby changing people’s travel behaviors. This research was aimed at exploring the relationship between socio-economic factors and e-scooter trip durations before and during the pandemic. We developed a hazard-based duration approach and estimated multiple spatial and non-spatial models on the basis of 2019 and 2020 dockless e-scooter data collected from the City of Austin’s Open Data Portal. The results indicated an overall increase in e-scooter trip durations after the pandemic. Moreover, analysis of variables revealed potential …
Bike-Sharing Station Usage And The Surrounding Built Environments In Major Texas Cities, Louis G. Alcorn, Junfeng Jiao
Bike-Sharing Station Usage And The Surrounding Built Environments In Major Texas Cities, Louis G. Alcorn, Junfeng Jiao
Research Collection College of Integrative Studies
This study analyzes the effect of different built environments on bike-share usage in nascent dock-based systems in three Texas cities. Past research offers little insight as to whether elements associated with higher bicycle usage in major cities affect ridership in secondary, developing bike-share markets within lower density American cities. In Austin and Houston, a positive relationship emerges between bike-share usage and proximity to high-comfort bicycle facilities. All three cities demonstrated surprisingly minimal relationship between bike-share usage and other proven drivers of bicycling activity in urban areas, which may result from system design for leisure- and recreation-based trips.
What Are The Relationships Between Public Transit And Gentrification Progress? An Empirical Study In The New York-Northern New Jersey-Long Island Areas, Yefu Chen, Hao Xi, Junfeng Jiao
What Are The Relationships Between Public Transit And Gentrification Progress? An Empirical Study In The New York-Northern New Jersey-Long Island Areas, Yefu Chen, Hao Xi, Junfeng Jiao
Research Collection College of Integrative Studies
Transit-oriented development has been a widely accepted tool among transportation planning practitioners; however, there are concerns about the risk of increasing residential property values leading to gentrification or displacements. Therefore, it is critical to provide precise investigations of the relationships between public transit and gentrification. Although numerous studies have explored this topic, few have discussed these relationships based on detailed measurements of gentrification from a regional perspective. This study aims to fill the research gap by measuring the gentrification subcategories through a hierarchical definition based on data in the New York–Northern New Jersey–Long Island areas and applying the transit desert …
From Shared Micro-Mobility To Shared Responsibility: Using Crowdsourcing To Understand Dockless Vehicle Violations In Austin, Texas, Shunhua Bai, Junfeng Jiao
From Shared Micro-Mobility To Shared Responsibility: Using Crowdsourcing To Understand Dockless Vehicle Violations In Austin, Texas, Shunhua Bai, Junfeng Jiao
Research Collection College of Integrative Studies
In recent years, many progressive U.S. cities have witnessed the rapid popularization of dockless small vehicles as a car-free travel alternative to meet the short distance travel demand. The research gap exists in revealing the social outcome of the massive influx of shared small vehicles on public space. To that end, this study analyzed 4,100 parking violation reports in Austin, Texas, crowdsourced from the Austin 311 non-emergency service request system. The results showed that sidewalk and other public space intrusions were the two most frequently reported violations. Additionally, it found that improperly parked vehicles in parks required the longest time …
Are There Transit Deserts In Europe? A Study Focusing On Four European Cases Through Publicly Available Data, Yefu Chen, Junfeng Jiao
Are There Transit Deserts In Europe? A Study Focusing On Four European Cases Through Publicly Available Data, Yefu Chen, Junfeng Jiao
Research Collection College of Integrative Studies
Public transit has been proven as an affordable travel method, while the inequitable distribution is a rising concern among practitioners and researchers. A transit desert, based on the demand and supply concept in measuring the mismatch in allocating the level of public transit service, has proved its ability to be applied in cases across countries. According to this concept, this study investigated transit deserts in four cases in Europe. Results indicate that the public transit system in Grand Paris and Madrid are superior due to a smaller population living in areas where public transit cannot meet the demand. Moreover, we …
Estimating E-Scooter Traffic Flow Using Big Data To Support Planning For Micromobility, Feng Chen, Junfeng Jiao, Haofeng Wang
Estimating E-Scooter Traffic Flow Using Big Data To Support Planning For Micromobility, Feng Chen, Junfeng Jiao, Haofeng Wang
Research Collection College of Integrative Studies
Dockless e-scooter sharing, as a new shared micromobility service, has quickly gained popularity in recent years. In this paper, we present a practical approach to estimating e-scooter flow patterns without knowing the actual routes taken by the e-scooter riders. Our method takes advantage of a huge open dataset that contains the origins and destinations of millions of trips. We show that our models can help cities better support the emerging shared micromobility service. The additional information generated in the modeling process can also be useful for a more refined analysis of e-scooter trips.
Modeling Factors Contributing To Dockless E-Scooter Injury Accidents In Austin, Texas, Amin Azimian, Junfeng Jiao
Modeling Factors Contributing To Dockless E-Scooter Injury Accidents In Austin, Texas, Amin Azimian, Junfeng Jiao
Research Collection College of Integrative Studies
Objective: Over the past few years, increased e-scooter ridership has raised concerns about the growing number of injury accidents involving e-scooters. Additionally, given the lack of appropriate e-scooter accident data, the extent to which built environment and socioeconomic factors affect e-scooter safety is unclear. In consideration of these issues, this study was aimed at identifying the factors contributing to the number of e-scooter injury accidents in Austin. Methods: We developed zero-inflated Poisson (ZIP) and zero-inflated negative binomial (ZINB) models on the basis of 2018 dockless e-scooter injury accident data collected from the Patch platform. The results indicated that the ZIP …
Understanding E-Scooter Incidents Patterns In Street Network Perspective: A Case Study Of Travis County, Texas, Junfeng Jiao, Shunhua Bai, Seung Jun Choi
Understanding E-Scooter Incidents Patterns In Street Network Perspective: A Case Study Of Travis County, Texas, Junfeng Jiao, Shunhua Bai, Seung Jun Choi
Research Collection College of Integrative Studies
Dockless electric scooter (E-scooters) services have emerged in the United States as an alternative form of micro transit in the past few years. With the increasing popularity of E-scooters, it is important for cities to manage their usage to create and maintain safe urban environments. However, E-scooter safety in U.S. urban environments remains unexplored due to the lack of traffic and crash data related to E-scooters. Our study objective is to better understand E-scooter crashes from a street network perspective. New parcel level street network data are obtained from Zillow and curated in Geographic Information System (GIS). We conducted local …
Shared Mobility And Transit-Dependent Population: A New Equity Opportunity Or Issue?, Junfeng Jiao, Fangru Wang
Shared Mobility And Transit-Dependent Population: A New Equity Opportunity Or Issue?, Junfeng Jiao, Fangru Wang
Research Collection College of Integrative Studies
Using shared mobility data collected from different sources and multinomial models, this paper investigates its role in serving transit-dependent populations and whether shared mobility can reduce transit deserts in New York City (NYC). It has been found that shared mobility has an important role in serving low-income populations with no car access and physically challenged travelers. However, shared mobility activities in NYC highly concentrate in wealthier areas with better transit access and less transit-dependent population. The findings indicate that without effective and appropriate policy and planning guidance, shared mobility may exacerbate transport equity issues even though they appear to be …
Public Transit Infrastructure And Heat Perceptions In Hot And Dry Climates, Yuliya Dzyuban, David M. Hondula, Paul J. Coseo, Charles L. Redman
Public Transit Infrastructure And Heat Perceptions In Hot And Dry Climates, Yuliya Dzyuban, David M. Hondula, Paul J. Coseo, Charles L. Redman
Research Collection College of Integrative Studies
Many cities aim to progress toward their sustainability and public health goals by increasing use of their public transit systems. However, without adequate protective infrastructure that provides thermally comfortable conditions for public transit riders, it can be challenging to reach these goals in hot climates. We took micrometeorological measurements and surveyed riders about their perceptions of heat and heat-coping behaviors at bus stops with a variety of design attributes in Phoenix, AZ, USA, during the summer of 2018. We identified the design attributes and coping behaviors that made riders feel cooler. We observed that current infrastructure standards and material choices …
Public Transit Infrastructure And Heat Perceptions In Hot And Dry Climates, Yuliya Dzyuban, David M. Hondula, Paul J. Coseo, Charles L. Redman
Public Transit Infrastructure And Heat Perceptions In Hot And Dry Climates, Yuliya Dzyuban, David M. Hondula, Paul J. Coseo, Charles L. Redman
Research Collection College of Integrative Studies
Many cities aim to progress toward their sustainability and public health goals by increasing use of their public transit systems. However, without adequate protective infrastructure that provides thermally comfortable conditions for public transit riders, it can be challenging to reach these goals in hot climates. We took micrometeorological measurements and surveyed riders about their perceptions of heat and heat-coping behaviors at bus stops with a variety of design attributes in Phoenix, AZ, USA, during the summer of 2018. We identified the design attributes and coping behaviors that made riders feel cooler. We observed that current infrastructure standards and material choices …
The (Digital) Medium Of Mobility Is The Message: Examining The Influence Of E-Scooter Mobile App Perceptions On E-Scooter Use Intent, Rabindra Ratan, Kelsey Earle, Sonny Rosenthal, Vivian Hsueh Hua Chen, Andrew Gambiro, Gerard Goggin, Hallam Stevens, Benjamin Li, Kwan Min Lee
The (Digital) Medium Of Mobility Is The Message: Examining The Influence Of E-Scooter Mobile App Perceptions On E-Scooter Use Intent, Rabindra Ratan, Kelsey Earle, Sonny Rosenthal, Vivian Hsueh Hua Chen, Andrew Gambiro, Gerard Goggin, Hallam Stevens, Benjamin Li, Kwan Min Lee
Research Collection College of Integrative Studies
The present research examines how perceptions of e-scooter mobile apps (i.e., a communication technology) influence intent to use e-scooters (i.e., a transportation technology) while considering other perceptions specific to e-scooters (ease of use, usefulness, safety, environmental impact, and enjoyment), context of use (geographic landscape), and demographic factors (age and sex). Results suggest mobile app perceived ease of use is associated with e-scooter use intent and this effect is mediated by e-scooter perceived usefulness, even when controlling for e-scooter perceived ease of use as well as other influential elements of e-scooter use. In addition to illustrating the importance of user experiences …
Understanding The Shared E-Scooter Travels In Austin, Tx, Junfeng Jiao, Shunhua Bai
Understanding The Shared E-Scooter Travels In Austin, Tx, Junfeng Jiao, Shunhua Bai
Research Collection College of Integrative Studies
This paper investigated the travel patterns of 1.7 million shared E-scooter trips from April 2018 to February 2019 in Austin, TX. There were more than 6000 active E-scooters in operation each month, generating over 150,000 trips and covered approximately 117,000 miles. During this period, the average travel distance and operation time of E-scooter trips were 0.77 miles and 7.55 min, respectively. We further identified two E-scooter usage hotspots in the city (Downtown Austin and the University of Texas campus). The spatial analysis showed that more trips originated from Downtown Austin than were completed, while the opposite was true for the …
How Much Do Users Value A Network Expansion? Evidence From The Public Transit System In Singapore, Eric Fesselmeyer, Haoming Liu
How Much Do Users Value A Network Expansion? Evidence From The Public Transit System In Singapore, Eric Fesselmeyer, Haoming Liu
Research Collection College of Integrative Studies
We estimate the network effects of a public transit system by examining the impact of its expansion on housing prices. Our results show that a major expansion of Singapore's Mass Rapid Transit (MRT) system increased the price of apartments within 0.5 km of a pre-expansion station by 1.8% relative to apartments that were further away from a station. Evaluated at the mean housing price, the expansion increased the value of pre-connected apartments by at least S$455 million in aggregate, which is equivalent to 9% of the estimated S$5 billion cost of the expansion.
How Much Do Users Value A Network Expansion? Evidence From The Public Transit System In Singapore, Eric Fesselmeyer, Haoming Liu
How Much Do Users Value A Network Expansion? Evidence From The Public Transit System In Singapore, Eric Fesselmeyer, Haoming Liu
Research Collection College of Integrative Studies
We estimate the network effects of a public transit system by examining the impact of its expansion on housing prices. Our results show that a major expansion of Singapore's Mass Rapid Transit (MRT) system increased the price of apartments within 0.5 km of a pre-expansion station by 1.8% relative to apartments that were further away from a station. Evaluated at the mean housing price, the expansion increased the value of pre-connected apartments by at least S$455 million in aggregate, which is equivalent to 9% of the estimated S$5 billion cost of the expansion.
Does Urban Form Influence Grocery Shopping Frequency? A Study From Seattle, Washington, Usa, Junfeng Jiao, Anne Vernez Moudon, Adam Drewnowski
Does Urban Form Influence Grocery Shopping Frequency? A Study From Seattle, Washington, Usa, Junfeng Jiao, Anne Vernez Moudon, Adam Drewnowski
Research Collection College of Integrative Studies
Purpose – The purpose of this paper is to ascertain how elements of the built environment may or may not influence the frequency of grocery shopping. Design/methodology/approach – Using data from the 2009 Seattle Obesity Study, the research investigated the effect of the urban built environment on grocery shopping travel frequency in the Seattle-King County area. Binary and ordered logit models served to estimate the impact of individual characteristics and built environments on grocery shopping travel frequency. Findings – The results showed that the respondents’ attitude towards food, travel mode, and the network distance between homes and stores exerted the …
Where Does Bicycling For Health Happen? Analysing Volunteered Geographic Information Through Place And Plexus, Greg P. Griffin, Junfeng Jiao
Where Does Bicycling For Health Happen? Analysing Volunteered Geographic Information Through Place And Plexus, Greg P. Griffin, Junfeng Jiao
Research Collection College of Integrative Studies
Research on the role of bicycling for health through physical activity has been limited by the lack of information on where bicyclists ride. New big data sources available through smartphone-based applications provide a rich source to provide bicycle volume data more comparable to the scale of information available for automotive and public transit modes. In the case of smartphone apps for fitness tracking, results of this data can be used similar to the growing application of global positioning systems for automotive travel surveying. The authors evaluate data from Travis County, Texas for the purpose of determining where bicyclists ride, primarily …
Impacts Of Beijing Bus Rapid Transit On Pre-Owned Home Values, Hao Pang, Junfeng Jiao
Impacts Of Beijing Bus Rapid Transit On Pre-Owned Home Values, Hao Pang, Junfeng Jiao
Research Collection College of Integrative Studies
Bus Rapid Transit (BRT) has gained increasing popularity worldwide in the last few decades. However, few studies have investigated BRT’s impacts on property values in Chinese cities. This research, taking BRT route 1 (BRT1) and BRT route 3 (BRT3) in Beijing as examples, showed that proximity to BRT3 stops is weakly related to pre-owned home prices along the route, whereas BRT1 has induced a significant price premium. For BRT1, the impact is not linear. Specifically, pre-owned home prices for homes within 5–10 minutes’ walking distance to BRT stations is 5.35% higher than those located closer to or farther away. The …
Transit Deserts: The Gap Between Demand And Supply, Junfeng Jiao, Maxwell Dillivan
Transit Deserts: The Gap Between Demand And Supply, Junfeng Jiao, Maxwell Dillivan
Research Collection College of Integrative Studies
The term “transit desert” is a new concept that looks at the gap between level of transit service (supply) and needs of a particular population (demand). These populations are often referred to as “transit dependent,” people that are too young, too old, or too poor or who are physically unable to drive. “Transit deserts” in this case are defined as areas that lack adequate public transit service given areas containing populations that are deemed transit-dependent. This study aims to analyze and establish a clear method for calculating and quantifying gaps between transit demand and supply using Geographic Information Systems (GIS). …
Grocery Shopping: How Individuals And Built Environments Influence Choice Of Travel Mode, Junfeng Jiao, Anne Vernez Moudon, Adam Drewnowski
Grocery Shopping: How Individuals And Built Environments Influence Choice Of Travel Mode, Junfeng Jiao, Anne Vernez Moudon, Adam Drewnowski
Research Collection College of Integrative Studies
This research investigated the influences of socioeconomic characteristics of individual travelers and of the environments where the travelers live and shop on choice of travel mode for grocery shopping. The data on travel for grocery shopping came from 2,001 respondents to the 2009 Seattle Obesity Study survey in King County, Washington. Eighty-eight percent of the respondents drove to their grocery stores, whereas 12% used transit or taxis, walked, biked, or carpooled. The addresses of 1,994 homes and 1,901 primary grocery stores used by respondents were geographically coded. The characteristics of built environments in the neighborhoods around homes and grocery stores …