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ORANGE COUNTY <br /> NORTH CAROLINA <br /> 95 <br /> Step S—Calculating the metrics. <br /> ArcGIS Pro was utilized to calculate the metrics <br /> for each parameter of each project in the TMP. Average Transportation Disadvantaged Index(TDI) <br /> ModelBuilder was used to develop geoprocessing scores were calculated for all projects in the TMP <br /> workflows to calculate the metrics for the different for the Environmental Justice parameter.Figure 6.6 <br /> measures determined in the previous steps.After illustrates the workflow used to determine average <br /> calculating the metrics in ArcGIS Pro,they were TDI scores.TDI scores are available at the census block <br /> processed in Excel to calculate their final scores.This group level.Once average TDI scores were determined, <br /> section gives an overview of the steps and processes they were normalized.Normalization was performed <br /> used to develop the geoprocessing workflows. by subtracting each average TDI score from the lowest <br /> A detailed explanation of the tools used in the TDI score within the project type and then dividing the <br /> ModelBuilder workflows are available in Appendix VII. result by the highest of the minimum TDI score. <br /> Calculate Subtract the Divide the <br /> average TDI lowest average average TDI score <br /> S score from the score from all by the highest <br /> selected census average TDI minimized <br /> block groups scores average TDI score <br /> Figure 6.6:Average TDI score Workflow <br /> Average volume,capacity,volume over capacity(V/C) capacity,V/C ratio,and truck volume.Road segments <br /> ratio,and truck volume were calculated for new location, from the TRM located completely within the buffer were <br /> widening,and modernization roadway projects.These selected to ensure that the correct road segments were <br /> metrics were used to satisfy the Improve Access and captured,even if the TRM roadway links are not perfectly <br /> Connectivity,Manage Congestion,and Improve freight aligned with the roadway project in the project shapefile. <br /> Movement parameters.New location and widening Since new location and widening projects generated <br /> projects calculated averages from both the no-build and averages from the no-build and build networks,the relative <br /> build networks,while modernization projects calculated change for each metric were also calculated.Calculations <br /> averages only from the no-build network.Figure 6.7 that are specific to new location and widening projects are <br /> illustrates the workflow to determine average volume, highlighted in light blue. <br /> Volume Calculate Calculate <br /> percent1�0 the relative <br /> Select road From the � change change in <br /> as - segments selected volume/ <br /> located —0 road capacity <br /> completely segments, <br /> within the calculate V/C Ratio Calculate <br /> buffer the average: relative <br /> Truck Volume change <br /> Figure 6.7:Average Volume, Capacity,V/C ratio, and Truck Volume Workflow <br /> PAGE 56 Orange County Transportation Multimodal Plan <br />