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Measuring Transportation Network Performance (2010) / Chapter Skim
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Building Blocks
Pages 28-31

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From page 28...
... FHWA has conducted several recent best practice studies of these efforts and released separate guidebooks directed toward MPOs and DOTs. The case studies most directly relevant to this scenario come from the Oregon and Washington State DOT efforts using system-level performance measures.
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From page 29...
... Define Performance Measurement Framework Traditionally, operations and planning staff have used separate performance measures with little coordination or Develop Measurement and Data Collection Methodologies Data Collection Both planning and operations functions make use of data, but often for different purposes. Planning typically uses data
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From page 30...
... Performance Measures Definition Average peak travel time • Facility: Average time required to traverse a section of roadway during peak travel period • Reliability: Includes the additional time that must be added to a trip to ensure a traveler will arrive at a destination at, or before, the intended time 95% of the time • Trip: The average time required to travel from origin to destination on a trip that might include multiple modes during peak period Throughput • Person: Number of persons traversing a facility section or screen line per unit time • Vehicle: Number of vehicles traversing a facility section or screen line per unit time Speed • The average speed of vehicles measured in a single lane, for a single direction of flow, at a specific location on a roadway Recurring delay • Vehicle delays that are repeatable for the current time of day, day of week, and day type Nonrecurring delay • Vehicle delays in excess of recurring delay for the current time of day, day of week, and day type Incident duration • The time elapsed from the notification of an incident until all evidence of the incident has been removed from the incident scene Extent of congestion • Spatial: Miles of roadway in an area and time period with average travel times 30% longer than unconstrained • Temporal; The time duration during which more than 20% of the roadway sections in an area are congested as defined by the Spatial Extent of Congestion performance measure Source: Adapted from Guide to Benchmarking Operations Performance Measures, NCHRP 20-7. Relevant Data and Analysis Practices Caltrans, working with the University of California, has developed a real-time performance measurement system (PeMS)
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From page 31...
... development of arterial performance measures and (2) the region's congestion management process, transportation system plans, corridor plans, and system management and operations.
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Key Terms

  • operations functions
  • state dot
  • planning staff
  • maryland state
  • state highway

  • highway administration
  • operations performance
  • traffic management
  • relief performance
  • state dots

  • washington state
  • congestion delay
  • planning typically
  • congestion relief
  • average time

  • capacity investments
  • analysis tools
  • peak travel
  • current time
  • screen line

  • eastern shore
  • unit time
  • travel times
  • state transportation
  • including planning

  • tem operations
  • key performance
  • data validation
  • define performance
  • incident data


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