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SHRP 2 L38 Work Plan & Project Progress Updates

University of Washington STAR Lab Sep 26 th , 2013. SHRP 2 L38 Work Plan & Project Progress Updates. Agenda. L08: HCM Methodology Introduction on L08 Tool testing progress Future plans L07: Design Treatment Introduction on design treatments in L07 tool Tool testing progress

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SHRP 2 L38 Work Plan & Project Progress Updates

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  1. University of Washington STAR Lab Sep 26th, 2013 SHRP 2 L38 Work Plan & Project Progress Updates

  2. Agenda • L08: HCM Methodology • Introduction on L08 • Tool testing progress • Future plans • L07: Design Treatment • Introduction on design treatments in L07 tool • Tool testing progress • Discussion on cooperation plan with L07 research team • L02: Monitoring • Tool testing progress • Future plans • C11 and L05 • Future plans

  3. L08 - Introduction • Incorporation of Travel Time Reliability into HCM • Develop travel time reliability as a performance measure in the 2010 HCM for freeway facilities (FREEVAL) • Develop travel time reliability as a performance measure in the 2010 HCM for urban street facilities (STREETVAL)

  4. L08 - Introduction • FREEVAL

  5. L08 - Introduction • STREETVAL

  6. L08 - Tool Testing Progress • Study site selection - data quality along I-5 JBLM corridor • Data looks consistent, but the volume is lower than expected • Not congested at 5:00 PM on weekday? • Traffic volume is about 1600 vehphpl, maximum is less than 2000 vehphpl • Mean TTI = 1.03 • Radar data

  7. L08 - Tool Testing Progress • Study site selection • I-405 MP 27-29 • 3:00 PM - 9:00 PM • AADT: 114,000

  8. L08 - Tool Testing Progress • FREEVAL outputs for I-405

  9. L08 - Tool Testing Progress • FREEVAL outputs for I-405

  10. L08 - Tool Testing Progress • User experience • If we want to run the tool with one segment

  11. L08 - Tool Testing Progress • User experience • No error would show up if we don’t decide the ramp metering option, until we finish the last step

  12. L08 - Tool Testing Progress • User experience • Tool requires that the first and last segments of the facility should be coded as basic segments (in the guide book but not in the tool) • Error won’t show up until the last step

  13. L08 - Tool Testing Progress • User experience • Information is scattered • A Lack of built in exceptions in the program • Travel time distribution graph is not illustrated in output result

  14. L08 - Future Plans • Further testing on FREEVAL • With Washington State incident data • With more alternative corridors • Compare L08 outputs with DRIVE Net outputs • Apply L08 methodology on DRIVE Net • Testing on STREEVAL

  15. L08 - Discussion

  16. L07 - Introduction • Basic characteristics → Untreated TTI Curve • Treatment Characteristics → Treated TTI Curve

  17. L07 - Tool Interface

  18. L07 – Treatment Introduction • Shoulder-related treatments Accessible shoulder (for removal of vehicles) Alternating shoulder (for work zones) Drivable shoulder (for diversion of vehicles)

  19. L07 – Treatment Introduction • Incident-related treatments Crash Investigation Site (urban area) Emergency Pull-off (rural area) Movable Cable Median Barrier

  20. L07 – Treatment Introduction • Emergency treatments Emergency Access (for emergency vehicles) Emergency Crossovers (keep open to all vehicles) Control (Gated) Turnarounds (used in emergency for all vehicles)

  21. L07 – Treatment Introduction • Treatments for specific sites Runaway Truck Ramp (used in steep downgrade roads) Wildlife Crash Reduction Anti-icing Systems Snow Fence Blowing Sand

  22. L07 – Treatment Introduction • Seldom-used treatments Extra High Median Barrier (eliminate rubbernecking) Incident Screen (at the roadside)

  23. L07 – Tool Testing Progress • Study site selection • I-5 MP 184 – 185.5 • Morning peak • 8:20 AM • Demand: 2688 vehplph • Afternoon peak • 5:30 PM • Demand: 4320 vehplph

  24. L07 – Tool Testing Progress • Output comparison (DRIVE Net vs. L07 tool)

  25. L07 – Tool Testing Progress • User experience • Output cannot exported, not be clearly read • Default values for demand input • Truck% --- 2.0%, RVs% --- 1.0% • HCM: • For freeways, 5% & 0 in urban area, 12% & 0 in rural area (as in L08)

  26. L07 – Tool Testing Progress • Movable Cable Median Barrier • A special designed wire cable barrier system, which can be removed to allow median crossovers. • v/c threshold • “T” threshold ? • The barrier would not be moved unless the incident duration is “T”?

  27. L07 – Tool Testing Progress • Effect of Treatments - Coefficient form From: L07finalreport P60

  28. L07 - Future Plans • Further use of tool • Contact with L07 research team, work on the cooperation • Locate one site for tool testing • Shoulder-related treatment should be easier to look at • Testing result validation/calibration

  29. Discussion • Which segment has such treatments for us to test? • Hourly demand data over a year is needed for test • How would we customize our needs? • Should we consider other routes because of the data quality issue along I-5 JBLM?

  30. L02 – Project Testing Progress • Study site selection • Seattle to Lynnwood (MP 162.83-181.15) • Used 5-minute data, 24 hours/day, Tues, Wed, Thurs, for all of 2011 • L02 does not recommend method to calculate segment travel times, used WSDOT method

  31. L02 – Project Testing Progress • Travel time results • Used 5:15 PM to represent PM peak • Measured 95% reliable travel time to be about 43 min in 2011 • Very close to travel times reported on WSDOT Grey Notebook Percentile Travel Time (min)

  32. L02 – Project Testing Progress • Analyze impact of certain conditions • Estimated travel time reliability under varying levels of congestion (Uncongested, Low, High) • Uncongested: <180 vehicles per lane per hour • On average, 10:30 PM-7:00 AM • Low: 180-720 vehicles per lane per hour • 7:00 AM-2:45 PM, 6:30 PM-10:30 PM • High: >720 vehicles per lane per hour • 2:45 PM-6:30 PM

  33. L02 – Project Testing Progress • Analyze Impact of certain conditions • Incidents • For this analysis an incident was defined to be present if something was blocking at least part of a lane anywhere along the route during the 5 minute interval. The corridor analyzed was 2 miles beyond the actual route to capture potential backups • Weather • Not available now

  34. L02 – Project Testing Progress

  35. L02 - Future Plans • Identify contributing factors of unreliability • Locate challenges to using the L02 guide • Suggest guide refinements • Travel speed calibration (Grey Notebook procedure) • Data quality control procedure (STAR Lab procedure) • Visualize L02 procedures on DRIVE Net for at least one route

  36. Future Plans – C11 • Use of tool: • How did the data input and output functions work? • What did you need to customize? • Explain your test case and results. • Were you able to validate your findings? • Was the economic impact forecast reasonable? Was it sensitive to operational changes? • Usefulness of tool : did the tool provide useful/meaningful results? • Suggested Guide Refinements

  37. Future Plans – L05 • Was the guide helpful in improving programmatic, planning, or project selection processes? • For what purposes will your agency utilize the L05 Guide? • Explain the Barriers or challenges to using the guide • Does the technical document provide adequate detail? • Explain the Usefulness/Value of L05 Guide • Suggested refinements

  38. Thanks!

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