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tc.sensors (development version)

tc.sensors 0.2.0.90001

  • Patch pull_extension() internal function. Remove port 8080 from URL. See issue #13 and PR #14.

tc.sensors 0.2.0

  • NEW functions!
    • add_distance() calculates the distance between sensors based on a given corridor and direction. Interpolates missing values by default.
    • generate_spatial_lines() generates an sf object with a LINESTRING for each given corridor, corridor direction, and corridor category. Limitations are noted in documentation.
  • Function update aggregate_sensor_data() is now aggregate_sensor()
    • _data() is superfluous, so was removed.
    • New name reinforces the function's purpose, which is to aggregate data from a single sensor.
    • New logical paramenters
      • replace_impossible, replace impossible volume and occupancy values in the 30-second (raw) data with NA
      • interpolate_missing, interpolate missing volume and occupancy using a rolling mean of the two neighboring observations (before and after).
      • occupancy_threshold, set a threshold for occupancy when calculating speed. Very low occupancy percentages were causing
  • Made significant progress on "Calculate speed and delay" vignette
    • Chose a subset of sensors to consistently work with
    • Used {mice} to impute null speed values with a random forest model based on total volume, total occupancy, hour, and day type.
    • Added bibliography with regional and international relevant literature
    • New plots
      • Plot proportion of all speed values that are NA by hour for 10-minute and 1-hour aggregations.
      • Plot relationship between speed, occupancy % and relative volume for 10-minute and 1-hour aggregations.
      • Plot observed and imputed speed density at 1-hour aggregations by day type.
      • Plot imputed speed values at 1-hour aggregation by hour and day type.
      • Plot speed and delay using the median speed from hours 1-5 and 20-24 (chosen arbitrarily) by hour.
  • General updates
    • Shift from using {dplyr} to {data.table}
    • Added a NEWS.md file to track changes to the package.