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Capacity and Level of Service at Unsignalized Intersections Final Report Volume 2 - All-Way-Stop-Controlled Intersections (1996) / Chapter Skim
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Chapter Four. Field Data Collection
Pages 25-30

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From page 25...
... Since capacity measurements were highly desirable, the first criterion was that continuous queueing Ewing on at least one stop-con~olled approach for at least five minutes on a normal day. Next, regions in each of five geographic areas of Be United States were identified: San Francisco/San lose, California metropolis area (southwest sector)
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From page 26...
... ones on minor street = 1 · Optional major street e~cch~sive lemon lane Number of Sues · Urban area = 3 · Rural area = 0 · Total sites = 3 26 Table 22. AWSC ~tersechon Sampling Plan Configurations ~1 tl Configuration #3 Geometry .
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From page 27...
... Number of Unique AWSC Intersection Sites Tables 23 and 24 show the number of sites Hat were videotaped by sector and by geometric configuration for AWSC intersections. The sampling plan retirements are also shown.
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From page 28...
... . 1 2 o 2 l 2 Groups 2, 3, and 4 Sites Seventeen approaches at 14 AWSC intersections had one lane on the subject approach and at least two lanes on one of the other approaches Table 27 lists the single lane approaches Mat have some combination of single and multiple lanes once opposing and conflicting approaches.
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From page 29...
... Raw Data Required for Model Esffmaffon For Each Vehicle ·Event time at conflict point ·Movement direction ·Vehicle type ·Lane used · Event time at end of queue · Event time at ilont of queue ·Event time departing queue Computed or DeH`red Data R4u~ for Model E~bnadon l For Each Traffic Stream ·Flow rates ·Stream composition For Each Vehicle · Service time for each opposing/conflicting case · Meshed or estimated capacity · Service time or delay ·Queue delay ·Totaldelay TRAGIC CHARACTERISTICS The data sets Hat were used for analysis of service time, cap acid, and debar characteristics included IS20 5-m~nute data points. Of these, 844 data points were from Group ~ sites, 168 from Groups 2, 3, and 4 sites, and 808 from Group 5 sites.
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From page 30...
... Flow Rate Data 1400 1 200 :,1000 .,, 800600400 200 n AWSC Intersection Data Summary Total Delay Dam _ 10 20 30 40 50 60 70 80 90 100 Total Delay Range Figure 6. Total Delay Data 800 600 400 200 o AWSC Intersection Data Surrey Service Time Data 4 6 8 10 12 14 16 18 20 Service Time Range E9gu" 7.
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Key Terms

  • time queued
  • percent time
  • total delay
  • flow rate
  • awsc intersection

  • major street
  • intersection data
  • time data
  • subject approach
  • awsc intersections

  • range figure
  • minor street
  • delay data
  • queued data
  • optional major

  • intersection sites
  • conflicting approaches
  • event time
  • data summary
  • total sites

  • unique awsc
  • service times
  • summary total
  • data awsc
  • sites hat

  • estimated capacity
  • date range
  • debar characteristics
  • model esffmaffon
  • flow data


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