A transit (GTFS) file reader for R
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README.md

Travis-CI Build Status cran version

Description

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.

Goal

This is a highly simplified fork/piece of the gtfsr package.

The goal is to break that package into parts to simplify maintenance.

Contributors

Among the many contributors, Danton Noriega wrote much of this package.

Installation

Install from CRAN:

install.packages('trread')

Usage

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