Field evaluation of smart sensor vehicle detectors at intersections - volume 2 : performance under adverse weather conditions.

Details

• Creators:
  Medina, Juan C. ; Benekohal, Rahim F. ; Ramezani, Hani
• Corporate Creators:
  Illinois Center for Transportation ; University of Illinois at Urbana-Champaign. Dept. of Civil and Environmental Engineering
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  • Signalized intersections
  • Microwave detectors
  • Sensors
  • Remote sensing
  • Vehicle detectors
  • Wireless communication systems
  • Weather
  • Data collection
  • Snow
  • Wind
  More +
• Publication/ Report Number:
  FHWA-ICT-13-014 ; ICT-13-014 ; UILU-ENG-2013-2009
• Resource Type:
  Tech Report
• Geographical Coverage:
  Illinois
• Corporate Publisher:
  Illinois. Dept. of Transportation. Bureau of Materials and Physical Research
• Abstract:
  Two microwave-based systems for vehicle detection (by Wavetronix and MS SEDCO) were evaluated at stop bar and ; advance zones of a signalized intersection under three adverse weather conditions: (1) wind, (2) snow-covered roadway, ; and (3) rain. Weather effects were very different for the two systems both in terms of the type of condition that could affect ; performance and in the magnitude of those effects. For Wavetronix, wind had significant effects on the advance zone by ; increasing false calls to over 50%, but it did not affect the stop bar zones. On the other hand, false calls in snow ; significantly increased to more than 40% in the stop bar zones and to about 30% in the advance zone. Snow also ; increased missed and stuck-on calls but in lower proportion than the false calls. Rain also affected the detection at stop ; bar zones, but all error types were below 8%, and it did not affect the advance zone. For Intersector, weather effects were ; less pronounced both at the stop bar and advance zones. Snow increased false calls to a range of about 4% to 8% ; compared to 1.65% to about 4% in normal weather. In addition, rain increased stuck-on calls to a range of 2.7% to 6.35% ; at the stop bar zones and increased missed calls at advance zones to 3.44%. Wind had no significant effects at stop bar ; or advance zones. In particular for the rain data, the intensity of the precipitation seemed to be related to the degree of ; performance degradation. In datasets with higher precipitation per unit of time, higher false calls were observed at ; Wavetronix stop bar zones, and a higher frequency of missed calls was observed at the Intersector advance zone. ; Findings from this evaluation can provide valuable information to users and manufacturers of these products regarding ; expected performance under adverse weather conditions at locations with similar mountings and settings, as well as ; insight about potential solutions to preventing negative effects in such scenarios.
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• Format:
  PDF
• Funding:
  R27-95
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/26738/dot_26738_DS1.pdf
• File Type:
  [PDF - 922.06 KB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:044916459d13a0e97c6e5a62e2f17c98ce6f224ad2888c72b79f73a82efa4511