Analytical Procedures for Determining the Impacts of Reliability Mitigation Strategies (2012) / Chapter Skim
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Pages 221-228
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221 A p p e n d i x d This appendix describes the variables that are present in the data sets developed as part of the analysis of congestion causes performed by the University of Washington's Washington State Transportation Center (TRAC-UW)
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222 Table D.1. Data Items Used in the Seattle Congestion-by-Source Analysis Column Variable Name Definition A link_name Roadway and Direction.
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223 AD Sum_vht Sum of the VHT from Operation Archive. AE Sum_vmt Sum of the VMT from Operation Archive.
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224 BG Precip_hour Hourly precipitation (in inches and hundredths) from the most recent reported hourly NOAA data.
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225 CD Construction variable 1. Construction.
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226 CN Queue Duration Crashes The number of 5-minute time periods during which the roadway is influenced (traffic is slower than the fastest travel time observed during a crash) for a defined crash.
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227 the test section in the time period immediately prior to that incident occurring or immediately after that incident stopped occurring. These time periods are indicated as 5+5 in the variable names in the study spreadsheet.
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228 The reality of this day is that a variety of events helped cause the congestion experienced by travelers. However, the instigating event appears to have been the original laneblocking incident.
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