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+travelynx - Railway Travel Logger
+---
+
+[travelynx](https://finalrewind.org/projects/travelynx/) allows checking into
+and out of individual trains, thus providing a log of your railway journeys
+annotated with real-time delays and service messages. At the moment, it only
+supports german railways and trains which are exposed by the Deutsche Bahn
+[IRIS Interface](https://finalrewind.org/projects/Travel-Status-DE-IRIS/).
+
+Dependencies
+---
+
+ * perl >= 5.10
+ * Cache::File (part of the Cache module)
+ * DBI
+ * DBD::SQLite
+ * Geo::Distance
+ * Mojolicious
+ * Travel::Status::DE::IRIS
+
+Setup
+---
+
+TODO
+
+Usage
+---
+
+For the sake of this manual, we will assume your travelynx instance is running
+on `travelynx.de`
+
+travelynx journey logging is based on checkin and checkout actions: You check
+into a train when boarding it, and check out again when leaving it. Real-time
+data is saved on both occasions, providing an accurate overview of both
+scheduled and actual journey times.
+
+## Checking in
+
+You can check into a train up to 10 minutes before its scheduled departure and
+up to 60 minutes after its actual departure (including delays). I recommend
+doing so when it arrives at the station or shortly after boarding.
+
+First, you need to select the station you want to check in from.
+Navigate to `travelynx.de` or use the travelynx text in the navigation
+bar. You will see a list of the five stations closest to your current location
+(as reported by your browser). Select the station you're at.
+
+If it is not in the list, you can also directly go do "travelynx.de/*station
+name*", e.g. "travelynx.de/Essen Hbf" or "travelynx.de/EE". Both names and
+DS100 codes are supported.
+
+Now, as soon as you select a train, you will be checked in and travelynx
+will switch to the journey / checkout view.
+
+## Checking out
+
+You can check out of a train up to 10 minutes before its scheduled arrival and
+up to 3 hours after its actual arrival. This ensures that accurate real-time
+data for your arrival is available.  I recommend checking out when arriving at
+your destination or shortly after having left the train.
+
+Once checked in, `travelynx.de` will show a list of all upcoming stops. Select
+one to check out there. You can also check out at a specific station
+by navigating to "travelynx.de/*station name*" and selecting "Hier auschecken".
+
+If you forgot to check out in time, or are departing the train at a station
+which is not part of its documented route (and also not part of its documented
+route deviations), or are encountering issues with travelynx' real-time data
+fetcher, the checkout action will fail with an error message along the lines
+of "no real-time data available" or "train not found".
+
+If you use the checkout link again, travelynx will perform a force checkout: it
+will log that you have left the train at the specified station, but omit
+arrival time, delay, and other real-time data. At the moment, this data cannot
+be specified manually.