trread is a package for reading the GTFS data standard into R. It can
read directly from URL’s or flat files, and does some validation of the
data structure against the specification.
This is a highly simplified fork/piece of the gtfsr package.
The goal is to break that package into parts to simplify maintenance.
Among the many contributors, Danton Noriega wrote much of this package.
You can install from CRAN:
install.packages('trread')
Fetch data for a bus system in Accra, Ghana from GitHub.
library(trread)
library(dplyr)
accra_gtfs <- import_gtfs("https://github.com/AFDLab4Dev/AccraMobility/raw/master/GTFS/GTFS_Accra.zip")
#> [1] "agency.txt" "calendar.txt" "feed_info.txt" "frequencies.txt"
#> [5] "routes.txt" "shapes.txt" "stop_times.txt" "stops.txt"
#> [9] "trips.txt"Count and list the number of stops per route.
attach(accra_gtfs)
routes_df %>% inner_join(trips_df, by="route_id") %>%
inner_join(stop_times_df) %>%
inner_join(stops_df, by="stop_id") %>%
group_by(route_long_name) %>%
summarise(stop_count=n_distinct(stop_id)) %>%
arrange(desc(stop_count))
#> # A tibble: 271 x 2
#> route_long_name stop_count
#> <chr> <int>
#> 1 Kasoa ↔ Accra New Town 116
#> 2 Omanjor ↔ Accra CMB 109
#> 3 Manhean ↔ Accra CMB 105
#> 4 Adeyman ↔ Abeka Lapaz 104
#> 5 Ashongman ↔ Abeka Lapaz 101
#> 6 Nungua ↔ Circle Odorna 91
#> 7 Odorna ↔ Nungua 91
#> 8 Teshie-Nungua ↔ Achimota 91
#> 9 Accra CMB ↔ Ablekuma 86
#> 10 Kasoa ↔ Korle Bu 84
#> # ... with 261 more rows