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GlossaryAccuracy. A measure of how well the data provided by a participant matches the reference data for a particular data element. Completeness. A measure of how well a participant was able to provide the correct number of a specific data element when compared to the reference data for that data element. Consistency. A measure of how well the data provided by a single participant for one repetition compares to the data provided by the same participant for his or her other two repetitions. These data are not compared to the reference data. Coverage. A determination of whether a participant pro- vided the required three repetitions of both the initial and final data sets. Final data set. The purpose of the final data set was to deter- mine how well the participants could collect the specific data elements of interest to the roadway safety community. The final data set contained the full set of data elements for the three repetitions on the six specific test site loca- tions for the Roadway Measurement System Evaluation Rodeo. Roadway assets and features were to be recorded as they were encountered and provided in the designated data delivery format. Geometrics data (grade, cross-slope, and curvature) were to be processed and provided at 0.01-mi intervals. All data elements were to be provided in the pre- scribed format, with associated GPS coordinates.26Initial data set. The purpose of the initial data set was to determine the ability of the individual participant to consis- tently collect roadway data under real-world conditions. The initial data set contained the images and processed geo- metric data for all three repetitions on the two rodeo survey routes. Three repetitions were performed on both routes in both directions for a total of 258 survey miles. All images collected were to be provided with the associated GPS coor- dinates. The geometrics and road profile data were to be processed and provided as IRI, grade, cross-slope, and cur- vature. These processed data were to be provided at 0.1-mi intervals, along with the associated GPS coordinates by the end of the rodeo week. Precision. A measure of how well a participantâs data for a specific data element from one repetition matched the par- ticipantâs data for the same data element from the other two repetitions. Semiautomated data reduction. The recording of road- way assets and/or features by a trained data reduction per- son using specialized software. One type of specialized software is Geo3Dâs Trident 3D Analyst. A trained oper- ator uses this software in combination with georefer- enced digital images to digitize the geolocation of roadway assets, such as signs. Operators also use the softwareâs data entry interfaces to enter data, such as support type and MUTCD code.
