Naturalistic Driving Study: Development of the Roadway Information Database (2014) / Chapter Skim
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Pages 28-35
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28 C h a p t e r 5 The RID includes two broad types of data: (1) new data collected and quality assured by SHRP 2 under the mobile data collection project discussed in previous sections of this report and (2)
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29 metropolitan planning organizations (MPOs)
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30 challenges associated with assessing the six data quality characteristics: • Timeliness. Data must be available for the NDS time frame.
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31 • Percentage of centerline miles represented. Total centerline miles included in the roadway database/total centerline miles of all roads in the study area.
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32 Table 5.2. Mapping of Mobile Data Items versus Available State Information Florida Washington Pennsylvania North Carolina New York Indiana T ie r 1 A lig nm en t Tangent State+, PI, central angle, compass bearing, degree of curve State No No No On-system only by curve class and location C ur ve Radius State No No No Length State No No No PC Lat State No No No Long State No No No PT Lat State No No No Long State No No No Direction State+ State No No No Grade Grade classes for HPMS only State No No No No Cross slope Horizontal HPMS segments only No No No No No Superelevation No State No No No No Lane Number State+ for through lanes State State+ State+ State+ State Width Total through lanes surface width State Derived State+ Pavement width, state+ Yes Type Through (state+)
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33 Table 5.3. Existing Data Items from the States, Excluding Mobile Data Items Florida Washington Pennsylvania North Carolina New York Indiana Signals State State State State, partial No State, partial Average annual daily traffic (AADT)
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34 impacted by the frequency of roadway disruptions due to construction, closures, incidents, or other capacity reduction factors. The supplemental data will aid researchers in conducting a more comprehensive analysis of driver, vehicle, and roadway interactions and full utilization of the NDS and RID databases.
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35 # Item Priority Category Description Data Type Data Frequency Time Period of Interest 1 Crash Data Common State's official crash file. GIS State/County Yearly 2006 2013 2 Traffic Information - AADT Safety Computed AADT by site or segment.
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