erDiagram
journey||--|{routesegments: "consists of"
routesegments||--||segment: "sorts"
segment||--|{departure: "consists of"
departure}|--|{station: "originates from"
departure}|--||vehicle: uses
vehicle||..|{line: "shared data"
segment}|--||vehicle: uses
stationlines}|..||station: "general connections"
stationlines}|..||line: groups


journey {
  int id PK
  string startstation
  string endstation
}
routesegments {
  int id PK
  int journey FK
  int segment FK
  int segmentorder
}
segment {
  int id PK
  string ref
  int startid FK
  int endid FK
  string vehicleid FK
}
departure {
  int id PK
  string ref
  string direction
  string vehicle FK
  string vehiclename
  string station FK
  string stationname
  string arrivaltime
  string departuretime
}
station {
  string id PK
  string name
}
stationlines {
  int id PK
  string stationid FK
  string lineid FK
}
vehicle {
  string vehicleid PK
  string name
  string line FK
}
line {
  string lineid PK
  string name
  string mode
  string destination
  string direction
  string fgcolor
  string bgcolor
}