Highlights
Wang, Y., Park, K., & Mau, K. H. (2025). Access for whom? Inequality and inequity in multi-modal accessibility to large parks. Urban Forestry & Urban Greening, 113, 129124. https://doi.org/10.1016/j.ufug.2025.129124 [download]

Large parks provide vital health, social, and environmental benefits, especially for low-income populations who face disproportionate exposure to environmental stressors and health challenges. While research has explored park access inequalities through walking and driving, less is known about access variations across different transport modes considering common travel sequences and shared mobility options. This study examines multi-modal accessibility to 58 large parks in Metro Vancouver, Canada, focusing on both spatial patterns of accessibility and underlying socioeconomic inequities. Using data from 3590 neighborhoods, we assess park accessibility through minimum distance, cumulative opportunities, and gravity models. Our findings reveal that driving provides the most equitable access distribution, while alternative modes, particularly shared mobility, show higher inequality and favor wealthier populations. The advanced gravity models accounting for travel time and park quality exposes greater disparities in shared mobility access compared to traditional approaches. These findings highlight the need for urban planners and policymakers to consider multimodal and equity-based approaches in green space planning. Ensuring that new and emerging transport options support rather than hinder equitable park access is critical for promoting inclusive urban environments and advancing environmental justice.
Chen, M., Liu, Y., Liu, F., Chadha, T., Park, K. (2025). Measuring pedestrian-level street greenery visibility through space syntax and crowdsourced imagery: A case study in London, UK. Urban Forestry & Urban Greening, 105, 128725. | https://doi.org/10.1016/j.ufug.2025.128725 [download]

Linear green spaces, composed of street trees, shrubs, and grass, provide diverse opportunities for human-nature interaction. However, current research tends to visualize street greenery from a single perspective, such as images or planar analysis and neglects pedestrian-scale street tree visual analytics. Space syntax relies on precise urban context data input, and street view image analysis does not cover sidewalk greenery visibility. This study integrates green visibility analysis based on space syntax’s Visibility Graph Analysis (VGA) with the Pedestrian Green View Index (PGVI) calculated from street imagery to propose a comprehensive evaluation model for pedestrian-scale green visibility. To validate the accuracy of the methods, we established a participation scoring system involving 183 volunteers to collect their green perceptions of nine types of streets in the City of London, UK. The study reveals a complex relationship between VGA and PGVI, with VGA providing a robust, geometric-based visibility measure and PGVI offering a qualitative, human-centric perspective on urban greenery. Our findings indicate a significant correlation between PGVI and human evaluations, affirming PGVI’s potential to reflect pedestrian experiences, while highlighting the limitations of VGA in capturing the nuanced, multi-dimensional aspects of human perception. This underscores the necessity of integrating human feedback in urban planning tools to ensure a comprehensive understanding of green spaces. Future research should enhance methodological rigor by incorporating temporal and seasonal dynamics, expanding datasets, and exploring the interplay between green visibility and other environmental factors.
Peer-Reviewed Journal Articles (Since October 2025)
Note: Names of the lab members are in bold
- Zhang, X., Chen, M., & Huang, Y. (2025). Who gets to use the street? Evaluate the utilization and inclusiveness using crowdsourced videos and vision-language models. Sustainable Cities and Society, 134, 106906. https://doi.org/10.1016/j.scs.2025.106906
- Wang, Y., Park, K., & Mau, K. H. (2025). Access for whom? Inequality and inequity in multi-modal accessibility to large parks. Urban Forestry & Urban Greening, 113, 129124. https://doi.org/10.1016/j.ufug.2025.129124 [download]
- Park, K., & Khanal, A. (2025). Park Features, Neighborhood Environment, and Time Factors Affect Park Visitor Volume: A Meta-Analysis. Environment and Behavior, 57(3-4), 296–325. https://doi.org/10.1177/00139165251342974 [download]
- Chen, M., Liu, Y., Liu, F., Chadha, T., Park, K. (2025). Measuring pedestrian-level street greenery visibility through space syntax and crowdsourced imagery: A case study in London, UK. Urban Forestry & Urban Greening, 105, 128725. https://doi.org/10.1016/j.ufug.2025.128725 [download]
- Yuan, Fan1., Chen, M1. (2025) A systematic review of measurement tools and senior engagement in urban nature: Health benefits and behavioral patterns analysis. Health & Place, 91, 103410. https://doi.org/10.1016/j.healthplace.2024.103410 [download]
- Sun, P., Chen, M., & Chen, J. (2025). The “Blue” Habitat of Urban & Suburban Areas and approaches for its biodiversity research: A scoping review. Journal of Environmental Management, 373, 123567. https://doi.org/10.1016/j.jenvman.2024.123567 [download]
- Luo, T., & Chen, M. (2024). Advancements in supervised machine learning for outdoor thermal comfort: A comprehensive systematic review of scales, applications, and data types. Energy and Buildings, 115255. https://doi.org/10.1016/j.enbuild.2024.115255 [download]
- Wang, Y., Rigolon, A., & Park, K. (2024). Transit to parks initiatives in the U.S. and Canada: Practitioners’ perspectives, Transport Policy 154: 84-95. https://doi.org/10.1016/j.tranpol.2024.06.007 [download] [link to the project page]
- Rigolon, A., Park, K., Choi, D., & Wang, Y. (2024). Riding transit to parks in Utah: Motivations, constraints, negotiations, and policy recommendations, Transportation Research Part D: Transport and Environment 133: 104297. https://doi.org/10.1016/j.trd.2024.104297 [download] [link to the project page]
- Park, K. (2023). Regreening Suburbia: An Analysis of Urban Greening Approaches in U.S. Sprawl Retrofitting Projects. Urban Forestry & Urban Greening 88: 128092. https://doi.org/10.1016/j.ufug.2023.128092 [download]
- Chen, S., Sleipness, O., Christensen, K., Yang, B., Park, K., Knowles, R., Yang, Z., & Wang, H. (2024). Exploring the Associations between Social Interaction and Park Quality: An Urban Case Study in Utah, USA, Cities 145: 104714. https://doi.org/10.1016/j.cities.2023.104714 [download]
- Chen, M., Cai, Y., Guo, S., Sun, R., Yang, S., & Shen, X. (2024). Evaluating implied urban nature vitality in San Francisco: An interdisciplinary approach combining census data, street view images, and social media analysis. Urban Forestry & Urban Greening, 128289. https://doi.org/10.1016/j.ufug.2024.128289 [download]
- Khanal, A., Abdelfattah, R. S., Alawadi, K., & Nguyen, N. H. (2024). Beyond streets: The role of alleys in Abu Dhabi’s and Dubai’s network systems. Journal of Urban Management, 13(1), 33-51. https://doi.org/10.1016/j.jum.2023.10.002 [download]
- Park, K., Garcia, I., & Kim, K. (2023). Who visited parks and trails more or less during the COVID-19 pandemic, and how? A mixed-methods study, Landscape Research Record 11: 157-171. [download]
- Park, K., Singleton, P.A., Brewer, S. & Zuban, J. (2023). Pedestrians and the built environment during the COVID-19 pandemic: Changing relationships by the pandemic phases in Salt Lake County, UT, USA. Transportation Research Record: Journal of the Transportation Research Board 2677(4): 448-462. https://doi.org/10.1177/03611981221083606 [download]
- Park, K., Nasr-Isfahani, H., Novack, V., Sheen, J., Hadayeghi, H., Song, Z., & Christensen, K. (2023). Impacts of disability on daily travel behaviour: A systematic review. Transport Reviews 43(2): 178-203. https://doi.org/10.1080/01441647.2022.2060371 [The editors’ choice] [download]
- Park, K., Farb, A., & George, B. (in press). Effectiveness of visual communication and collaboration tools for online GIS teaching: Using Padlet and Conceptboard. Journal of Geography in Higher Education. https://doi.org/10.1080/03098265.2022.2065669 [download]
- Alawadi, Khaled., Khanal, A., Mouselly, Abdallah & Aletaywi, Abrar Bashar. (2022). “Planning in the age of pandemics: Renewing suburban design”. Sustainable Cities and Society, 87. https://doi.org/10.1016/j.scs.2022.104261 [download]
- Zhang, Y., Li, X., Jiang, Q., Chen, M., & Liu, L. (2022). Quantify the spatial association between the distribution of catering business and urban spaces in London using catering POI data and image segmentation. Atmosphere, 13(12), 2128. https://doi.org/10.3390/atmos13122128 [download]
- Ren, B., Park, K., Shrestha, A., Yang, J., McHale, M., Bai, W., Wang, G. (2022). Impact of Human Disturbances on the Spatial Heterogeneity of Landscape Fragmentation in Qilian Mountain National Park, China, Land, 11: 2087. https://doi.org/10.3390/land11112087 [download]
- Wang, L., Ding, J., Chen, M., Sun, Y., Tang, X., & Ge, M. (2022). Exploring tourists’ multilevel spatial cognition of historical town based on multi-source data—A case study of Feng Jing ancient town in Shanghai. Buildings, 12(11), 1833. https://doi.org/10.3390/buildings12111833 [download]
- Alawadi, K., Khanal, A., & Sohdy Abdelfattah, R. (2022). Typological index of alleyways: mapping the pattern of a forgotten urban form element. Journal of Urban Design, Pages 1-26. https://doi.org/10.1080/13574809.2022.2105199 [download]
- Shen, X., Chen, M., Ge, M., & Padua, M. G. (2022). Examining the conceptual model of potential urban development patch (PUDP), VOCs, and food culture in urban ecology: A case in Chengdu, China. Atmosphere, 13(9), 1369. https://doi.org/10.3390/atmos13091369 [download]
- Chen, M., Zhang, Y.*, Yang, Y., Fang, Z. (2022). Application of data visualization in urban design based on Grasshopper. Landscape Architecture 陈铭泽,张洋,杨玉冰,方智果. 基于Grasshopper平台的数据可视化在城市设计中的研究与实践[J].园林, 2022, 39(05):44-51. [download]
- Park, K., Sanchez, T., & Zuban, J. (2022). Evaluating scholarly productivity and impacts of landscape architecture faculty using citation analysis. Landscape Journal 41(1): 1-14. https://doi.org/10.3368/lj.41.1.1 [download]
- Park, K., Chamberlain, B., Song, Z., Nasr-Isfahani, H., Sheen, J., Larsen, T., Novack, V., Licon, C., & Christensen, K. (2022). A double jeopardy: COVID-19 impacts on people with disabilities’ travel behavior and community living. Transportation Research Part A: Policy and Practice 156: 24-35. https://doi.org/10.1016/j.tra.2021.12.008 [download]
- Hinners, S., Rose, J., Choi, D., & Park, K. (2022). Geographically Evaluating Urban-Wildland Juxtapositions across 36 Urban Areas in the United States. Geography and Sustainability 3(2): 139-151. https://doi.org/10.1016/j.geosus.2022.05.004 [download]
- Dietsch, A. M., Jazi, E., Floyd, M. F., Ross-Winslow, D., & Sexton, N. R. (2021). Trauma and transgression in nature-based leisure. Frontiers in Sports and Active Living, 3. https://doi.org/10.3389/fspor.2021.735024 [download]
- Alawadi, K., Khanal, A., & Al Hinai, S. (2021). “Rethinking suburban design: streets v/s alleys in improving network connectivity”. Journal of Urban Design, 26(6), 725-745. https://doi.org/10.1080/13574809.2021.1921570 [download]
- Alawadi, K., Khanal, A., El Doudin, A., & Abdelghani, R. (2021) “Revisiting transit-oriented development: alleys as critical walking infrastructure”. Transport Policy, 100, 187-202. https://doi.org/10.1016/j.tranpol.2020.11.007 [download]
- Abu Ali, M., Alawadi, K., & Khanal, A. (2021). “The role of green infrastructure in enhancing microclimate conditions: a case study of a low-rise neighborhood in Abu Dhabi”. Sustainability, 13(8), 4260. https://doi.org/10.3390/su13084260 [download]