Create a commuter rail query — tm_cr

Constructs a TmCRQuery object for the given MBTA commuter rail route. Calling $stop() on a terminus station will issue a warning because stop IDs are often missing in one direction at termini, making headway/dwell data potentially incomplete.

Usage

tm_cr_query(route, base_url = tm_base_url())

Arguments

route: CR route ID, e.g. "CR-Fairmount", "CR-Lowell". Use tm_cr_routes() to see all valid route IDs.
base_url: API base URL. Defaults to the production host or the tm_dashboard_base_url option.

Value

A TmCRQuery R6 object.

Examples

if (FALSE) { # \dontrun{
tm_cr_query("CR-Fairmount")$stop("Fairmount")$headways("2024-01-15")

# Terminus warning is emitted here:
tm_cr_query("CR-Fitchburg")$stop("Wachusett")$headways("2024-01-15")
} # }