Get NTD data

Usage

get_ntd(
  agency = "all",
  data_type = "adjusted",
  ntd_variable = "UPT",
  modes = "all",
  cache = FALSE
)

agency: Name of the transit agency to retrieve. Defaults to `all` agencies
data_type: Type of NTD data. Either "raw" for data released without adjustments or "adjusted" for data with adjustments and estimates
ntd_variable: Which variable to return. `UPT` for unlinked passenger trips, `VRM` for vehicle revenue miles, `VRH` for vehicle revenue hours, or `VOMS` for vehicles operated in maximum service.
modes: Transit mode to retrieve. Common modes include `MB` (bus), `CR` (commuter rail), `HR` (heavy rail), `LR` (light rail). Defaults to `all` modes.
cache: Cache downloaded data. Defaults to `FALSE`.

A data frame of monthly NTD data with the requested ntd_variable in the `value` column

if (FALSE) { # interactive()
get_ntd(agency = "City of Madison", modes = c("MB", "DR"))
}