Luyu Liu
Biographic Data
| ID | 4426678 |
|---|---|
| NAME | Luyu Liu |
| GIVEN NAMES | Luyu |
| FAMILY NAME | Liu |
| SIGNATURE | LIU L |
| AFFILIATIONS | Auburn University |
| ORCID | 0000-0002-6684-5570 |
| VERIFIED | Yes |
| TOTAL WORKS | 16 |
| TOTAL CITATIONS | 16 |
| AUTHOR COUNT | 16 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 2020 |
| LATEST PUBLICATION YEAR | 2026 |
| H-INDEX | 2 |
General Transit Feed Specification
This entry explores the history, structure, applications, and challenges of both the General Transit Feed Specification (GTFS) and GTFS Realtime (GTFS‐RT), and illustrates their impact on transit systems and their role in shaping future transportation analytics. The GTFS is the de facto open data standard for the representation, communication, and analysis of public transportation systems. As well as providing a foundation for trip planning, tran…
Covid‐19 Pandemic's Impacts on Passenger Transportation
The COVID‐19 pandemic is one of the most impactful public health crises in this century, which negatively impacted transportation systems from both the demand and supply side. In the short term, lockdowns and travel bans led to an unprecedented decline in mobility demand and large‐scale service cuts. Meanwhile, supply of mobility faced severe disruptions due to quarantine measures and manpower shortages. During the intermediate phase, transportat…
Accessibility derivative
Accessibility is one of the most essential objectives of public transit systems as the transit service’s useability and service quality. The accessibility of transit systems as a whole is well understood; however, it is still unclear how each route contributes to the system-wide accessibility. Meanwhile, with a higher risk of disruptions and more uncertainties from climate change and other disruptions, there is an urgent need to systematically st…
Measuring exposure to extreme heat in public transit systems
Using computer vision and street view images to assess bus stop amenities
Potentials and limitations of large-scale, individual-level mobile location data for food acquisition analysis
Evaluating accessibility benefits and ridership of bike-transit integration through a social equity lens
The cost of climate change
Public transit offers urban populations physical accessibility to resources and opportunities. However, at the same time, transit trips often expose users to extreme environmental conditions, such as extreme heat and cold since transit journeys usually include out-of-vehicle trip segments including walking and waiting. Such exposure can be considered as environmental health costs because exposure to weather extremes can lead to adverse health out…
Disparities in public transit accessibility and usage by people with mobility disabilities
Measuring the impacts of disruptions on public transit accessibility and reliability
Measuring the impacts of dockless micro-mobility services on public transit accessibility
Comparison of Prevalence and Risk Factors of PTSS Between Chinese Patients With Depression and Non-depressed Controls During Covid-19 Outbreak
Background: COVID-19 pandemic is a traumatic event all over the world, and may lead to post-traumatic stress symptom (PTSS) in different population who are under the threat of novel corona virus. Therefore, the aim of our study was to compare the prevalence and risk factors of PTSS between Chinese patients with depression and non-depressed controls during the COVID-19 outbreak. Methods: 437 depressed patients and 2,940 non-depressed controls were…
Holocene precipitation changes in the Balikun basin based on high-resolution sporopollen quantitative reconstruction
The impacts of the modifiable areal unit problem (Maup) on social equity analysis of public transit reliability
Measuring risk of missing transfers in public transit systems using high-resolution schedule and real-time bus location data
The emergence of urban Big Data creates new opportunities for a deeper understanding of transportation within cities, revealing patterns and dynamics that were previously hidden. Public transit agencies are collecting and publishing high-resolution schedule and real-time vehicle location data to help users schedule trips and navigate the system. We can use these data to generate new insights into public transit delays, a major source of user diss…
The impacts of Covid-19 pandemic on public transit demand in the United States
The COVID-19 pandemic and related restrictions led to major transit demand decline for many public transit systems in the United States. This paper is a systematic analysis of the dynamics and dimensions of this unprecedented decline. Using transit demand data derived from a widely used transit navigation app, we fit logistic functions to model the decline in daily demand and derive key parameters: base value , the apparent minimal level of deman…
The impacts of the modifiable areal unit problem (Maup) on social equity analysis of public transit reliability
Measuring risk of missing transfers in public transit systems using high-resolution schedule and real-time bus location data
The emergence of urban Big Data creates new opportunities for a deeper understanding of transportation within cities, revealing patterns and dynamics that were previously hidden. Public transit agencies are collecting and publishing high-resolution schedule and real-time vehicle location data to help users schedule trips and navigate the system. We can use these data to generate new insights into public transit delays, a major source of user diss…
Measuring exposure to extreme heat in public transit systems
Using computer vision and street view images to assess bus stop amenities
The impacts of Covid-19 pandemic on public transit demand in the United States
The COVID-19 pandemic and related restrictions led to major transit demand decline for many public transit systems in the United States. This paper is a systematic analysis of the dynamics and dimensions of this unprecedented decline. Using transit demand data derived from a widely used transit navigation app, we fit logistic functions to model the decline in daily demand and derive key parameters: base value , the apparent minimal level of deman…
Measuring risk of missing transfers in public transit systems using high-resolution schedule and real-time bus location data
The emergence of urban Big Data creates new opportunities for a deeper understanding of transportation within cities, revealing patterns and dynamics that were previously hidden. Public transit agencies are collecting and publishing high-resolution schedule and real-time vehicle location data to help users schedule trips and navigate the system. We can use these data to generate new insights into public transit delays, a major source of user diss…
Measuring the impacts of dockless micro-mobility services on public transit accessibility
Comparison of Prevalence and Risk Factors of PTSS Between Chinese Patients With Depression and Non-depressed Controls During Covid-19 Outbreak
Background: COVID-19 pandemic is a traumatic event all over the world, and may lead to post-traumatic stress symptom (PTSS) in different population who are under the threat of novel corona virus. Therefore, the aim of our study was to compare the prevalence and risk factors of PTSS between Chinese patients with depression and non-depressed controls during the COVID-19 outbreak. Methods: 437 depressed patients and 2,940 non-depressed controls were…
Holocene precipitation changes in the Balikun basin based on high-resolution sporopollen quantitative reconstruction
The impacts of the modifiable areal unit problem (Maup) on social equity analysis of public transit reliability
Disparities in public transit accessibility and usage by people with mobility disabilities
Measuring the impacts of disruptions on public transit accessibility and reliability
Evaluating accessibility benefits and ridership of bike-transit integration through a social equity lens
The cost of climate change
Public transit offers urban populations physical accessibility to resources and opportunities. However, at the same time, transit trips often expose users to extreme environmental conditions, such as extreme heat and cold since transit journeys usually include out-of-vehicle trip segments including walking and waiting. Such exposure can be considered as environmental health costs because exposure to weather extremes can lead to adverse health out…
Covid‐19 Pandemic's Impacts on Passenger Transportation
The COVID‐19 pandemic is one of the most impactful public health crises in this century, which negatively impacted transportation systems from both the demand and supply side. In the short term, lockdowns and travel bans led to an unprecedented decline in mobility demand and large‐scale service cuts. Meanwhile, supply of mobility faced severe disruptions due to quarantine measures and manpower shortages. During the intermediate phase, transportat…
Accessibility derivative
Accessibility is one of the most essential objectives of public transit systems as the transit service’s useability and service quality. The accessibility of transit systems as a whole is well understood; however, it is still unclear how each route contributes to the system-wide accessibility. Meanwhile, with a higher risk of disruptions and more uncertainties from climate change and other disruptions, there is an urgent need to systematically st…
Measuring exposure to extreme heat in public transit systems
Using computer vision and street view images to assess bus stop amenities
Potentials and limitations of large-scale, individual-level mobile location data for food acquisition analysis
General Transit Feed Specification
This entry explores the history, structure, applications, and challenges of both the General Transit Feed Specification (GTFS) and GTFS Realtime (GTFS‐RT), and illustrates their impact on transit systems and their role in shaping future transportation analytics. The GTFS is the de facto open data standard for the representation, communication, and analysis of public transportation systems. As well as providing a foundation for trip planning, tran…
Public transport (12 works) · Engineering (11 works) · Transport engineering (11 works) · Urban Transport and Accessibility (9 works) · Business (8 works) · Geography (8 works) · Computer Science (7 works) · Transportation Planning and Optimization (5 works) · Climate change (3 works) · Economics (3 works)