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High Value Research in Illinois

High Value Research in Illinois. SPEED PHOTO-RADAR ENFORCEMENT. Just the Facts, Ma’am. WHAT? SPEED PHOTO-RADAR ENFORCEMENT WHO? Dr. Rahim Benekohal WHERE? University of Illinois at Urbana-Champaign WHEN? 7/1/2005 - 6/30/2008 HOW MUCH? $309,000. What We Looked At.

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High Value Research in Illinois

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  1. High Value Research in Illinois SPEED PHOTO-RADAR ENFORCEMENT

  2. Just the Facts, Ma’am • WHAT? • SPEED PHOTO-RADAR ENFORCEMENT • WHO? • Dr. Rahim Benekohal • WHERE? • University of Illinois at Urbana-Champaign • WHEN? • 7/1/2005 - 6/30/2008 • HOW MUCH? • $309,000

  3. What We Looked At • Speed photo-radar enforcement (SPE) vs. traditional methods • Police presence (with/without patrol lights on) • Speed display trailers • Combination of police presence/speed display • Determine effects on • Traffic flow characteristics • Safety in work zones

  4. What is SPE?

  5. What We Looked At • Two interstate work zones • Effect at treatment location • Spatial effects • Impact on speed 1.5 miles down the road • Temporal (halo) effects • Impact on speed 40-60 minutes after treatment removed

  6. What We Found • SPE significantly reduced speed of cars and trucks in work zone • SPE did have spatial effects • SPE reduced speed/percentage of speeders downstream from treatment • SPE had limited halo effect; police presence had none • SPE was most effective treatment

  7. Implementation • Illinois has implemented SPE statewide • Specially trained state police officers • Deploy SPE vans • Review/approve violations for citation issuance • Appear in court for adjudication of all approved work zone citations • Illinois has expanded SPE • One van for each IDOT region (5 total)

  8. Questions? Amy Schutzbach Engineer of Physical Research Illinois Department of Transportation Amy.Schutzbach@illinois.gov (217) 782-2631

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