Enhanced Crash Risk Estimation in Urban Environments: Integrating Multi-Source Data and Advanced Modeling Approaches for the City of Pittsburgh

Details

• Creators:
  Tao, Tao ; Qian, Sean ; Weiss, Leonard
• Corporate Creators:
  Carnegie Mellon University ; Carnegie Mellon University. Traffic21 Institute. Safety21 University Transportation Center (UTC) ; University of Pittsburgh
• Corporate Contributors:
  United States. Department of Transportation. University Transportation Centers (UTC) Program ; United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology ; United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  • Crash injury research
  • Emergency medical services
  • Injury severity
  • Transportation corridors
  • Urban transportation
  • Emergency communication systems
  • Data collection
  • Center lines
  • Literature reviews
  • High Injury Network (HIN)
  More +
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States ; Pittsburgh (Pennsylvania)
• Corporate Publisher:
  Carnegie Mellon University. Traffic21 Institute. Safety21 University Transportation Center (UTC)
• Description:
  High Injury Networks help inform the decision which streets an agency treats first, and they are almost always built from police-reported crashes alone. That record is known to miss injuries, and to miss crashes unevenly in space. We test whether a second, independently collected source names different high injury streets. Using City of Pittsburgh data for 2020 to 2024, we merge the street centerline into 4,332 corridors covering 933.5 miles, build a KABCO-aligned severity index for 14,298 emergency medical dispatches from crew-recorded disposition, transport mode and patient-handling fields corrected by a negation-aware reading of the scene text, and assign each of the 18,267 crashes and each dispatch to a single corridor. We then apply the City's rule identically to each layer, flagging a corridor when any 1,500 ft window holds five or more fatal-and-injury events or any 200 ft window holds two or more serious-or-fatal events. EMS attends fewer traffic events than police but records more injuries, 6,529 against 5,429. The two layers select overlapping but distinct networks: 128 crash corridors and 164 EMS corridors, agreeing on 100 of those corridors, which carry 73.0 percent of flagged mileage. The 64 EMS-only corridors are mostly Local and Collector streets and mark candidate under-reported segments. The procedure requires no personal identifiers and no record-level match across data sources.
• Format:
  PDF
• Funding:
  69A3552344811 ; 69A3552348316
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/93537/dot_93537_DS1.pdf
• File Type:
  [PDF - 10.44 MB]
• Collection(s):
  University Transportation Centers
• Main Document Checksum:
  urn:sha-512:99bbad0528f98ee832f220606d51dd2f412b9d3b16ae19c4b110becea1422b24b24865e8b824b05aff25ca4bacd60e92764b13a485b45ea4b3f8b99293bb2eac