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106 A p p e n d i x A data dictionary Artifact Title(s): Enter the artifact title. A data dictionary is a companion document that describes the data stored in the data set. It is a user guide about the data set file. Template Instructions This is a template that principal investigators should use to make their data dictionaries. The following points provide some instructions for completing this template: ⢠The italicized text shows the data dictionary instruction text. Please update or delete the italicized text before uploading. ⢠You may upload the same data dictionary to more than one data set if appropriate. ⢠Please add or remove headings as you wish. You could add other headings that briefly explain interesting observations in the data set that corresponds to this data dictionary. Background This data set was collected/processed for the SHRP 2 Project XX. Data Collection This section is only for detector data (e.g., loop data, weather data, Bluetooth data, cell phone data). Summarize the major points about the data collection. These might include ⢠Detector type (Bluetooth, loop, etc.); ⢠Road/road authority that owns the road (e.g., state); ⢠Number of stations; ⢠Date/duration of data collected; ⢠Other relevant information (e.g., whether it was in a construc- tion site, poor weather). Processing Techniques Quickly summarize any processing techniques used, in one to two sentences. Any users who want more background about pro- cessing techniques can read the final report. Column Descriptions Using Table A.1, include a description of each column, the units of measurement, and any other relevant information. Add as many rows as necessary. Acknowledgments Acknowledge those who ⢠Supplied the detector data (i.e., road authorities or other organizations); ⢠Primarily processed the data; or ⢠Contributed in other ways (but no personal acknowledg- ments). Data Dictionary Template Table A.1. Column Descriptions CSV Column Header Title Ingested Data Set Column Header Title Column Description Units of Measurement SPEED Exampleâ speed Average speed of vehicles passing the detector station Miles/hour OCC Occupancy Average occupancy of the detector station Percentage
