Just a reminder that single things in the real world should have a single identifier.
I am seeing this:
T4 City Circle to Cronulla route_id: I_1e
T4 City Circle to Cronulla route_id: I_1f
T4 City Circle to Waterfall route_id: I_1b
T4 City Circle to Waterfall route_id: I_1c
This combination of names and identifiers is sure to confuse software users who will simply see duplicate names and will wonder whose responsible for this nonsense.
Fortunately, the solution is simple. Disambiguate the name so it describes to the user what the identifier represents in the real world.
I don’t mean to be short, but it is a serious matter and should be high on your TODO list.