traffic_safety_camera_assessment

Code needed to reproduce traffic safety camera analysis

Here are the basic instructions needed to use this code:

1. Begin running the first R script, 0_clean_crashes.R.
2. When you reach lines 79 and 80, you will write to disk a table of all crashes missing geographic coordinates. Then you will need to use the ESRI World Geocoder or a similar tool to geocode those entries. The remainder of 0_clean_crashes.R reads the geocoded table back into R and appends these entries to those that already have suitable geographic coordinates.
3. Run 1_clean_cameras.R, which removes duplicates from the contractor's camera data (i.e. entries with identical geographic coordinates).
4. Run 2_geoprocessing.R, which actually calls the Python script stored in the python directory. This Python file uses ArcGIS geoprocessing tools to join the crashes and cameras to their appropriate road segments.
5. Run 3_aggregate_crashes.R, which summarizes the crashes by road segment and time period.
6. Run 4_inference_euclidean.R, which performs the analysis.