shrp 2 reliability project l38 minnesota pilot test site · 2 crash records also contain weather...
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SHRP 2 Reliability Project L38
Minnesota Pilot Test Site
October 29, 2013
Minnesota Department of Transportation
SRF Consulting Group, Inc.
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L02: 1) Were you able to identify contributing factors of unreliability?
2) Were you able to validate your findings?
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Travel Time (minutes)
None Weather Event Crash
Incident Road Work OtherCombination
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L02: 3) Explain the Barriers or challenges to using the L02 Guide
DMS Logs• Message• Time Deployed• Time Cleared
MnCMAT Records2
• Time• Location• Severity
RTMC Incidents• Time• Type Code• Response Code
Road Work1
• Time/duration• Location• Impacts
Crashes• Time/duration• Location• Severity
Incidents• Time/duration• Impact• Type/cause
Road Work DB• Time Start/End• Impact• Details
Crash Database• Time Start/End• Impact• Details
Incident Database• Time Start/End• Impact• Details
Data Sources Pre-Processing Database Inputs
1 Construction and maintenance activities also being identified through MnDOT news releases.
2 Crash records also contain weather and road conditions data will be referenced to weather data.
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Pe
rce
nta
ge
Travel Time (min)
None_Weekdays_Apr to Sep time: 9 to 19 (12849) Twins_A_Weekdays_Apr to Sep time: 9 to 19 (1813)
VMT & None_Weekdays_Apr to Sep time: 9 to 19 (12849) VMT & Twins_A_Weekdays_Apr to Sep time: 9 to 19 (1813)
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L02: 4) Usefulness/Value of the L02 Guide
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L02: 5) Suggested Guide refinements
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L02: 6) Other Comments
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L07: 1) Use of toola. Ease of GUIb. Data input
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L07: 2) Explain your test case (this is probably best suited for the power point)
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I-94 Westbound
Lowry Hill
Tunnel
I-35W SB
On Ramp to
11th Street
TH 280
On Ramp to
Huron Blvd
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L07: 3) Were you able to validate/calibrate your findings
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I-94 Westbound
Lowry Hill
Tunnel
I-35W SB
On Ramp to
11th Street
TH 280
On Ramp to
Huron Blvd
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L07: 4) Usefulness/Value of tool: Has the tool provide useful/meaningful results yet?
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L07: 5) Suggested tool refinements
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Congested Traffic
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L07: 6) Other comments
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L05: 1) Was the guide helpful in improving programmatic, planning, or project selection processes?
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L05: 2) For what purposes will your agency utilize the L05 Guide?
Project L02Establishing Monitoring Systems for Travel Time
Reliability
Project C11Improved Economic
Analysis Tools
Project L08Non-Recurrent
Congestion Factors in HCM Methods
Project L07Evaluation of Highway
Design Features to Improve Reliability
Project L05Incorporating Reliability
into Planning & Programming Process
Identifying Prioritizing Institutionalizing
Issues Solutions Reliability
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L05: 3) Explain the Barriers or challenges to using the guide.4) Does the technical document provide adequate detail?
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L05: 5) Explain the Usefulness/Value of L05 Guide
• Existing performance measures
– Congestion
– Safety
– Bridge Condition
– Pavement Condition
– Reliability (future performance measure?)
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L05: 6) Suggested refinements
Reliability IndexMeasured
Value
𝑇𝑇𝐼 =𝑇𝑇𝑀𝑒𝑎𝑛
𝑇𝑇𝐹𝑟𝑒𝑒𝐹𝑙𝑜𝑤1.08
𝐵𝐼 =𝑇𝑇95% − 𝑇𝑇𝑀𝑒𝑎𝑛
𝑇𝑇𝑀𝑒𝑎𝑛0.26
On-Time Performance(1.25*FFTT)
92.4%
𝑃𝑇𝐼 =𝑇𝑇95%
𝑇𝑇𝐹𝑟𝑒𝑒𝐹𝑙𝑜𝑤1.36
𝑇𝑇𝐼80% =𝑇𝑇80%
𝑇𝑇𝐹𝑟𝑒𝑒𝐹𝑙𝑜𝑤1.07
𝑀𝐼 =𝑇𝑇97.5%
𝑇𝑇𝐹𝑟𝑒𝑒𝐹𝑙𝑜𝑤1.66
VS.
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Travel Time (minutes)
None Weather Event Crash
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