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Related Experiment Videos

Estimating waste transfer station delays using GPS.

Bruce Gordon Wilson1, Julie K Vincent

  • 1University of New Brunswick, Department of Civil Engineering, P.O. Box 4400, Frederticton, New Brunswick, Canada E3B5A3. wilsonbg@unb.ca

Waste Management (New York, N.Y.)
|November 23, 2007
PubMed
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Global Positioning System (GPS) data recorders effectively measure solid waste vehicle delays at transfer stations. Analysis revealed significant differences in queuing times and unloading durations across facilities and vehicle types.

Area of Science:

  • Environmental Science
  • Transportation Engineering
  • Logistics Management

Background:

  • Solid waste transfer stations are critical nodes in waste management infrastructure.
  • Efficient vehicle flow at transfer stations is essential for operational effectiveness and cost reduction.
  • Current methods for tracking vehicle movements and identifying bottlenecks are often labor-intensive and lack precision.

Purpose of the Study:

  • To evaluate the efficacy of on-board Global Positioning System (GPS) data recorders for collecting field data on solid waste collection vehicle movements at transfer stations.
  • To analyze vehicle activity patterns, including queuing and unloading times, using GPS data and geofencing techniques.
  • To identify and quantify delays experienced by waste collection vehicles at different transfer facilities.

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Main Methods:

  • Utilized on-board GPS data recorders to track the movements of five waste collection vehicles over one year at four distinct transfer facilities.
  • Applied geofencing analysis to spatial GPS data to categorize vehicle activities: weigh scale queuing, weigh scale presence, tipping floor queuing, and waste unloading.
  • Compared time spent on each activity across different facilities and vehicle types.

Main Results:

  • GPS data successfully identified and quantified queuing delays for waste collection vehicles.
  • The average time spent by trucks at a facility was 16.4 minutes (SD=14.3 min), with a wide range (2-111 min).
  • Multi-compartment vehicles (co-collection, recycling) exhibited significantly longer unloading times. Facility-specific differences in queue length and location were observed, with weigh scale and tipping floor access being primary delay points at different sites.

Conclusions:

  • On-board GPS technology provides a viable and accurate method for monitoring solid waste vehicle operations at transfer stations.
  • Understanding vehicle movement patterns and identifying delay points through GPS data can inform strategies for improving transfer station efficiency.
  • Variations in facility design and operational procedures significantly impact vehicle throughput and delay durations, necessitating tailored management approaches.