Regional Planning & Research

Research & Analysis

SCAG’s Research & Analysis Division is led by Frank Wen, PhD, and specializes in geographic, demographic, and economic analysis for local and regional planning initiatives – as well as “state of the practice” research in socioeconomic projections, local review and input process, and Environmental Justice Analysis. Simon Choi, PhD, the Chief Demographer at SCAG and is recognized as a national leader in demographic forecasting and population analysis. Working under Dr. Wen and Dr. Choi are a group of GIS and Data analysts, including Javier Aguilar, Kimberly Clark, Dr. John Cho, Jung Seo, and Ping Wang.

Additional Information

For additional information, please contact:

Dr. Simon Choi
Chief in Forecasting and Research
(213) 236-1849

Publications

  1. Spatial and Socioeconomic Analysis of Commuting Patterns in Southern California Using LODES, CTPP, and ACS PUMS

    By Tom Vo, Assistant Regional Planner, Jung Seo, Regional Planner Specialist, JiSu Lee, Intern, Simon Choi, Chief of Research and Forecasting, and Frank Wen, Manager of Research and Analysis at the 2016 TRB Annual Meeting in Washington D.C., January 2016. This study discusses about the relationship between commuting pattern and socioeconomic characteristics in Southern California, using multiple datasets.

  2. Spatial Distribution of Urban Runoff Pollutant in the Southern California Region and Its Impacts on Environmental Justice Analysis: An Application of GIS Using EPA’s PLOAD Model and SCAG Land Use Scenario Dataset

    By Tom Vo, Assistant Regional Planner, Ping Wang, Regional Planner Specialist, Alison Linder, Senior Regional Planner, Simon Choi, Chief of Research and Forecasting, and Frank Wen, Manager of Research and Analysis, and Michael Mroczek, Intern at the 2016 TRB Annual Meeting in Washington D.C., January 2016. This study utilizes EPA’s BASIN PLOAD module to spatially calculate and visualize urban runoff pollutant in relation to different urban growth scenarios and land use changes.

  3. Firm Location and Urban Land Use Change

    By Cheol-Ho Lee, Senior Regional Planner at the Association of American Geographers 2016 Annual Meeting in San Francisco, CA. This study discusses the interaction between firm location and urban land use change.

  1. Urban Runoff Pollutants Spatial Distribution in SCAG Region: An application of GIS using EPA’s PLOAD model and SCAG land use scenario dataset

    By Tom Vo, Assistant Regional Planner, Ping Wang, Regional Planner Specialist, Alison Linder, Senior Regional Planner, Simon Choi, Chief of Research and Forecasting, and Frank Wen, Manager of Research and Analysis at the 2015 ICOET in Raleigh, North Carolina, January 2016. This study applies GIS and EPA’s Pollutant Loading Estimator (PLOAD) module to estimate and digitize the non-point source spatial distribution within the SCAG region.

  2. Exploration of Influential Factors on Multiple Severity Levels of Traffic Collisions In Southern California

    By Tom Vo, Assistant Regional Planner, Wen Cheng, Associate Professor at Cal Poly Pomona, Simon Choi, Chief of Research and Forecasting, Frank Wen, Manager of Research and Analysis, and Tou Sun, Intern at the 2015 ACSP in Houston, Texas, October 2015. This study examines and identifies influential factors to different severity levels of traffic accidents in SCAG region.

  3. Monitoring Gentrification in the Transit-Oriented Communities Using Performance Indicator

    By John Cho, Associate Regional Planner, Frank Wen, Manager of Research and Analysis, and Simon Choi, Chief of Research and Forecasting at the 2015 ACSP in Houston, Texas, October 2015. This analysis examines the social equity impacts of neighborhoods that have experienced transit-induced revitalization in the past years, hence reflecting the recent emerging interest in equitable transit-oriented development.

  4. Visualization of Commuter Flow Using CTPP Data and GIS applications

    By Tom Vo, Assistant Regional Planner, Jung Seo, Regional Planner Specialist, Simon Choi, Chief of Research and Forecasting, Frank Wen, Manager of Research and Analysis, and JiSU Lee, Intern at the 2015 ESRI UC in San Diego, California, July 2015 and 2015 TRB Annual Meeting in Washington D.C., January 2015. This study conducts a commuter flow analysis for jurisdictions in the region by developing an automated workflow using CTPP, ArcGIS, SAS, and Python.

  5. Historical Collision Patterns in Southern California

    By Tom Vo, Assistant Regional Planner, Jung Seo, Regional Planner Specialist, and Jonathan Rivas, Intern at the 2015 ESRI UC in San Diego, California, July 2015. This study is to visualize collision patterns from 2003 – 2012 in the SCAG region, understand pattern changes for car, bicycle, pedestrian, and truck collisions, and examine the relationship between high collisions and areas with disadvantaged communities.

  6. Python Scripting for Efficient Regional Land Use Data Management and QC Workflow

    By Jung Seo, Regional Planner Specialist, Simon Choi, Chief of Research and Forecasting, Frank Wen, Manager of Research and Analysis, and Tom Vo, Assistant Regional Planner at the 2015 ESRI UC in San Diego, California, July 2015. This study discusses about the development of an effective workflow for quality-checking on SCAG’s regional land use database by utilizing Python script.

  7. Demonstrating Local Population Projection Portal

    By Simon Choi, Chief of Research and Forecasting, Derek Hung, Assistant Regional Planner, Tom Vo, Assistant Regional Planner, Kimberly Clark, Regional Planner Specialist, Jung Seo, Regional Planner Specialist, John Cho, Associate Regional Planner, Hsi-Hwa Hu, Transportation Modeler IV, Abhishek Sharma, IT Consultant, and Frank Wen, Manager of Research and Analysis at the 2015 ESRI UC in San Diego, California, July 2015. This study discusses about the development of SCAG’s educational GIS-based tool generate different population growth paths containing demographic characteristics (i.e. age and gender) and components of growth, with housing growth scenarios.

  8. Not Just Golf Carts: Promoting the Use of Neighborhood Electric Vehicles (NEV) by Targeting Neighborhoods Apt for NEV Adoption

    By Kimberly Clark, Regional Planner Specialist, Marco Anderson, Senior Regional Planner, and Matthew Abad, Intern at the 2015 TRB Annual Meeting in Washington D.C., January 2015. This study explores possible neighborhood apartments for NEV adoption.

  9. Smart Growth Emissions Outcomes and Compliance with Title VI

    By Simon Choi, Chief of Research and Forecasting, Frank Wen, Manager of Research and Analysis, and Kimberly Clark, Regional Planner Specialist at the 2015 TRB Annual Meeting in Washington D.C., January 2015. This study discusses about outcomes of smart growth emissions and its compliance with Title VI.

  1. Application of Python Scripting for Major Work Destination Analysis

    By Tom Vo, Assistant Regional Planner, Jung Seo, Regional Planner Specialist, and Yunkyung Choi, Intern at the 2014 ESRI UC in San Diego, California, July 2014. This study identifies the major work destinations for each jurisdiction in the SCAG region, visualizes the spatial patterns of the major work destinations for each jurisdiction, and provides informational data resources to local jurisdictions for planning purposes.

  2. Automated Workflow Using Python Scripting to Build the SCAG Map Books

    By Jung Seo, Regional Planner Specialist, Simon Choi, Chief of Research and Forecasting, and Frank Wen, Manager of Research and Analysis at the 2014 ESRI UC in San Diego, California, July 2014. This study discusses about the development of an automated process to produce the SCAG Map Books for 197 local jurisdictions in the region.

  3. Neighborhood Environment and Health Behavior in Los Angeles Area

    By Hsi-Hwa Hu, Transportation Modeler IV, John Cho, Associate Regional Planner, Guoxiong Huang, Manager of Modeling and Forecasting, Frank Wen, Manager of Research and Analysis, Simon Choi, Chief of Research and Forecasting, Margaret Shih and Amy Lightstone, Los Angeles County Department of Public Health, Transport Policy 33: 40-47. This study analyzed the relationship between obesity and transit accessibility in the Los Angeles region.

  4. Framework and methodology to monitor and asses likely gentrification/displacement impacts from transit-oriented development (TOD)

    By Frank Wen, Manager of Research and Analysis, Hsi-Hwa Hu, Transportation Modeler IV, Cheol-Ho Lee, Senior Regional Planner, John Cho, Associate Regional Planner, Simon Choi, Chief of Research and Forecasting at the APHA 142nd Annual Meeting & Exposition in November 15-19, 2014 at New Orleans, Louisiana. This analysis examines changes in demographic and economic trends in transit-oriented development areas.

  5. Identify Distressed Communities and Lack of Parks within their Immediate Vicinity

    By Javier Aguilar, Senior Regional Planner at the CalGIS Conference in April 2014 at Seaside, CA. This study discusses about the relationship between built environment and public health. It also provides methodology to calculate distressed neighborhood (DN) index using GIS automation process.

  6. Connecting LAFCOs and COGs for Mutual Benefits

    MPOs—SB 375—LAFCOs SCAG Practices/Experiences and Future Collaborations with LAFCOs by Frank Wen, Manager, Research & Analysis, Land Use & Environmental Planning, presented at LAFCO Annual Conference, October 17, 2014.

  7. Millennials: Who are They? Implications on Regional Planning

    Presented by Simon Choi, Chief of Research and Forecasting, John Cho, Regional Planner, and Frank Wen, Manager of Research and Analysis to the Community, Economic & Human Development (CEHD) Committee on October 2, 2014.

  1. Environmental Justice Analysis of Goods Movement in Southern California

    By Frank Wen, Manager of Research and Analysis, Jung Seo, Regional Planner Specialist, Simon Choi, Chief of Research and Forecasting, and Sungbin Cho, at the 2013 METRANS International Urban Freight Conference (I-NUF) in October 2013 at Long Beach, California and at the 14th TRB National Transportation Planning Applications Conference in May 2013 at Columbus, Ohio.

  2. Environmental Justice Analysis of Minority and Low-Income Populations Adjacent to Goods Movement Corridors in Southern California

    By Jung Seo, Regional Planner Specialist, Frank Wen, Manager of Research and Analysis, Javier Minjares, Regional Planner Specialist, and Simon Choi, Chief of Research and Forecasting. This analysis is included in the Transportation Research Record: Journal of the Transportation Research Board in October 2013 and presented at the TRB 92nd Annual Meeting in January 2014 at Washington, D.C.

  3. Visualization of LODES/OnTheMap Work Destination Data Using GIS and Statistical Applications

    By Jung Seo, Regional Planner Specialist at the 2013 Local Employment Dynamics (LED) Partnership Annual Workshop in June 2013 at Suitland, Maryland. This study discusses about the automation process in GIS and its effectiveness in producing origin-destination maps for numerous local jurisdictions.

  4. Integration of a Parcel-Based Sketch Planning Model with GIS to Measure GHG Emissions

    By Jung Seo, Regional Planner Specialist, Hsi-Hwa Hu, Transportation Modeler IV, Frank Wen, Manager of Research and Analysis, and Simon Choi, Chief of Research and Forecasting at the 14th TRB National Transportation Planning Applications Conference in May 2013 at Columbus, Ohio.

  5. Enhancing GIS Accessibility for Local Governments in Southern California

    By Javier Aguilar, Senior Regional Planner at CalGIS 2013 Conference in April 2013 at Long Beach, CA. This study discusses about the importance and positive externalities of SCAG GIS Services Programs to local jurisdictional members.

  6. The Built environment and public health: Using visualization techniques and analyses to better inform decision makers and impacted communities

    By Javier Aguilar, Senior Regional Planner at the Southern California Public Health Association (SCPHA) in December 2013 at The California Endowment’s Center for Healthy Living in Los Angeles, CA. This study uses GIS to better visualize the relationship between built environment and public health for the purpose of informing decision makers and impacted communities.

  7. Climate Change and Sustainable Development: SCAG’s 2012-2035 Regional Transportation Plan/Sustainable Communities Strategy

    By Hasan Ikhrata, Frank Wen, Simon Choi, April 2013. This study discusses the planning and policy emphasis of the newly developed Regional Transportation Plan/Sustainable Communities Strategy (RTP/SCS) to achieve the regional Greenhouse Gas emissions target set forth by the California Air Resources Board.

  8. Assessment of Truck Border Crossing at Imperial County Port of Entry

    By Rajeev Seetharam, P.E., Mike Jones, Annie Nam, Khalid Bekka, Ph.D., Stephane Gros, Ph.D., Alejandro Solis, Ph.D., January 2013. This paper documents the current commodity flow patterns and associated economic activity at the California-Baja California border region of Imperial County. It also examines the trends and characteristics of international trade that determine the demand for freight activities across the border, focusing on international trade between the U.S. and Mexico. This paper summarizes some of the key findings of the study in terms of current supply chain structure in the region, data collection using Origin-Destination (O/D) surveys, measurement of crossing times at the border, economic implications, and policy recommendations.

  9. Smart Growth, Environmental Justice, and Projected Cancer Risk in Southern California: A Case Study in Regional Planning and Public Health

    By Kimberly Clark, Frank Wen, Simon Choi, Hsi-Hwa Hu, January 2013. This study examines the implications of “smart growth” land use and 8 transportation strategies for the public health of various population groups.

  1. Technology Helps Local Governments Leverage Limited Resources

    By Javier Aguilar, Javier Minjares, Angela Rushen, November 2012. This article describes the SCAG's GIS Services Program for Local Governments in Southern California.

  2. A Modeling Approach toward Developing Small Area Demographic Projection

    By Simon Choi, October 2012. The popular cohort component method is not easily applicable to population projections of small area (e.g., census tracts, transportation analysis zones). This study proposes a modeling approach to develop population projections of local communities through the enhanced linkage of small area housing growth and regional demographic processes. This study discusses key components of the proposed modeling approach.

  3. Aging Population and Greenhouse Gas (GHG) Emissions In the Southern California Region

    By Hsi-Hwa Hu, Simon Choi, Frank Wen, October 2012. The objective of this research is to examine how the elderly population and their residential location and land uses affect the greenhouse gas (GHG) emissions in the SCAG region.

  4. Evaluation of Census 2010 Block Level Data

    By Sung Ho Ryu, Cheol-Ho Lee, Jung H. Seo, Simon Choi, SeongHee Min, July 2012. This study evaluates Census 2010 Data with GIS, and introduces the Census Count Question Resolution Program.

  5. Regional Collaboration to Address Global Challenges: California SB 375 and SCAG Experiences

    By Frank Wen, July 2012. This study SCAG's regional collaboration process to develop regional transportation plan and sustainable communities strategy under SB 375.

  6. SCAG Supporting the California Household Travel Survey

    SCAG Supporting the California Household Travel Survey.

  7. Travel Behavior of Hispanic Immigrants of Southern California - Impact Analysis of Future Growth based on Parcel-Based Sketch Planning Mode

    By Hsi-Hwa Hu, Simon Choi, Frank Wen, February 2012. The objective of this research is to analyze and estimate the impact of future growth of Hispanic immigrants on the transportation system in Southern California. A parcel-based statistical model system was developed to perform this analysis.

  8. Exploring the Methods of Estimating Vehicle Miles of Travel

    By Hsi-Hwa Hu, Simon Choi, Frank Wen, Gerard Walters, Christopher J. Gray, February 2012. The purpose of this research is to develop a statistical model to estimate total household VMT.

  9. Greenhouse Gas Emissions And Transportation: New Regional Planning Process and Modeling Practice in Southern California

    By Hasan Ikhrata, Frank H. Wen, Simon Choi. The paper discusses how California Senate Bill (SB) 375 changes the existing way of developing the regional transportation plan to achieve the regional Greenhouse Gas (GHG) emissions target. SB 375 relies on the existing framework of developing a regional transportation plan (RTP) to achieve the regional target emissions reduction. Sustainable Communities Strategy (SCS) or alternative planning strategy (APS) is a planning strategy that is intended to achieve a regional target emissions reduction. Two major findings from the recent SB 375 implementation process include: (1) Metropolitan Planning Organizations (MPO) and the California Air Resources Board (CARB) collaborated to implement the standard modeling practice (e.g., data and assumptions for transportation demand modeling) in preparation for regional target setting. (2) SCAG has made substantial progress in enhancing the current four step transportation demand model and developing advanced models (e.g., Production, Exchange, and Consumption Allocation System (PECAS), Activity Based Model (ABM) and Local Sustainability Planning Tool (LSPT).