Evaluating Accessibility of Los Angeles Metropolitan Area Using Data-Driven Time-Dependent Reachability Analysis

The research team will investigate how accessibility of city blocks is quantified through the transport systems utilizing real traffic flow data from the Los Angeles Metropolitan Area. Accessibility is a complex function of origin locations, destination locations, the underlying transportation network, the dynamic weights on the edges of the networks representing travel times during different times of the day, etc. To understand accessibility, a proper evaluation of accessibility is essential. One major way to evaluate the accessibility of public facilities such as hospitals is reachability analysis which determines whether certain city blocks can be reached from at least one of these facilities within a certain time span. An isochrone is generally defined as a curve drawn on a map connecting points at which moving objects (e.g., cars) arrive at the same time if they leave from the same origin, and it is one of the most efficient tools used in addressing the reachability analysis problem. The investigators will define the isochrone and reverse isochrone problems, describe their approach to solving them, and provide a functional system that is capable of visualizing the reachability in various ways.

• Record URL:
  https://ncst.ucdavis.edu/project/evaluating-accessibility-los-angeles-metropolitan-area-using-data-driven-time-dependent

Language

• English

Project

• Status: Completed
• Funding: $100000
• Contract Numbers:

  DOT 69A3551747114

• Sponsor Organizations:

  Office of the Assistant Secretary for Research and Technology

  University Transportation Centers Program
  Department of Transportation
  Washington, DC  United States  20590

  National Center for Sustainable Transportation

  University of California, Davis
  Davis, CA  United States 
• Managing Organizations:

  National Center for Sustainable Transportation

  University of California, Davis
  Davis, CA  United States 

  METRANS Transportation Center

  University of Southern California
  Los Angeles, CA  United States  90089-0626
• Project Managers:

  Iacobucci, Lauren

• Performing Organizations:

  National Center for Sustainable Transportation

  University of California, Davis
  Davis, CA  United States 

  METRANS Transportation Center

  University of Southern California
  Los Angeles, CA  United States  90089-0626
• Principal Investigators:

  Shahabi, Cyrus

  Kim, Seon Ho

• Start Date: 20210816
• Expected Completion Date: 20220815
• Actual Completion Date: 20230703
• USDOT Program: University Transportation Centers

Subject/Index Terms

• TRT Terms: Accessibility; Mobility; Origin and destination; Time dependence; Traffic data; Traffic flow
• Geographic Terms: Los Angeles (California); Los Angeles Metropolitan Area
• Subject Areas: Highways; Operations and Traffic Management; Planning and Forecasting;

Filing Info

• Accession Number: 01778513
• Record Type: Research project
• Source Agency: National Center for Sustainable Transportation
• Contract Numbers: DOT 69A3551747114
• Files: UTC, RIP
• Created Date: Jul 30 2021 4:49PM