ableitung Bahn
A comprehensive suite of commands for Deutsche Bahn trains - live departures, delay tracking, Baustellen/disruption alerts, journey planning, connection parsing, historical delay stats, and delay predictions. No API keys needed.
Flags
| Flag | What it does | When to use |
|---|---|---|
--predict |
Runs the exponential delay model (transferProb, zugbindungProb) | User asks about probability of catching a transfer or Zugbindung being lifted |
--stats |
Fetches historical bahn.expert aggregate data per train | User asks about historical delay patterns for a specific train |
Examples
# Search for a train station
node scripts/bahn.mjs --search "Wuppertal" [--json]
# Find latest departures from a given station
node scripts/bahn.mjs --departures "Wuppertal Hbf" [--results N] [--json]
# Default: Parse and show live data
echo '<raw Navigator share text>' | node scripts/bahn.mjs --parse [--json]
# With prediction model (transferProb, zugbindungProb)
echo '<text>' | node scripts/bahn.mjs --parse --predict [--json]
# With historical stats from bahn.expert
node scripts/bahn.mjs --parse connections/active.json --stats [--json]
# Both
node scripts/bahn.mjs --parse connections/active.json --predict --stats [--json]
# Find a given journey in timetable
node scripts/bahn.mjs --journey "From" "To" [--date YYYY-MM-DD] [--time HH:MM] [--results N] [--days N] [--json]
# Get current delays
node scripts/bahn.mjs --live --current-leg N [--delay M] connections/active.json [--json]
# Find a specific train by number and category (example: ICE 933)
node scripts/bahn.mjs --category CAT --train NUM [--date YYYY-MM-DD] [--json]
File Layout
scripts/
├── bahn.mjs ← thin CLI dispatcher (~60 lines)
├── lib/
│ ├── commands/ ← one module per mode
│ │ ├── search.mjs ← --search: station lookup
│ │ ├── departures.mjs ← --departures: live departure board
│ │ ├── parse.mjs ← --parse: connection parsing + enrichment
│ │ ├── journey.mjs ← --journey: route search
│ │ ├── live.mjs ← --live: real-time transfer check
│ │ └── track.mjs ← --track: train tracking
│ ├── helpers.mjs ← shared helpers (envelope, transfers, assessment)
│ ├── data.mjs ← source router (IRIS/Vendo/bahn.expert)
│ ├── predict.mjs ← probability model (opt-in via --predict)
│ ├── stats.mjs ← delay profiles + historical stats (opt-in via --stats)
│ ├── parse.mjs ← connection text parser
│ ├── format.mjs ← output formatter
│ ├── messageLookup.mjs ← IRIS delay code lookup
│ └── sources/
│ ├── bahn-expert.mjs ← bahn.expert tRPC source
│ ├── iris.mjs ← IRIS XML source
│ └── vendo.mjs ← db-vendo-client source
JSON Envelope
All modes support --json:
{
"mode": "string",
"timestamp": "ISO8601",
"connection": { "date", "from", "to", "legs", "transfers" },
"journeyOptions": { "from", "to", "date", "options" },
"departures": { "station", "entries" },
"stations": { "query", "results" },
"liveStatus": { "currentLeg", "nextTransfer", "zugbindungStatus", "recommendation", "remainingTransfers" },
"trackStatus": { "train", "from", "to", "stops", "maxDelay", "zugbindungStatus" },
"assessment": null,
"errors": [],
"warnings": []
}
The assessment field is only populated when --predict is used. Without it, assessment is null.
Prediction Model (predict.mjs) — opt-in only
Exponential delay distributions per train category. Only loaded when --predict is passed.
| Category | Mean delay | Cancel rate |
|---|---|---|
| ICE | 5.0min | 5.5% |
| IC/EC | 4.0min | 4.0% |
| RE | 2.5min | 2.0% |
| RB | 2.0min | 1.5% |
| S | 1.5min | 1.0% |
| Bus | 3.0min | 2.0% |
P(Zugbindung triggered) per leg = exp(-20/mean). Overall P(Zugbindung) = 1 - ∏(1 - P(leg_i ≥ 20min)).
Coverage
Long-distance (ICE/IC/EC), regional (RE/RB), S-Bahn, buses, and international trains to neighboring countries.
Information
This project is not affiliated in any way with Deutsche Bahn AG, bahn.expert or bahn-vorhersage.