On Tuesday, July 13, 2021 10:34:05 AM CEST, 'Thierry Le Boulenge' via
> How much do Trip planner apps feel they have to absolutely stick to
> publishing these schedule times as a "truth" (as opposed to completely
> overriding them with better available predictions, realtime or not)?
I only know one approach that actually does something completely different.
Regarding the actual timetable, there are different models to for modelling
the actual timetable;
1) create fixed timetable stops where times are accurate while everything
in between is approached, this solves thing for transfers.
2) The "Delft Method" for planning, which creates a first order prediction
with a certain percentille for a trip, this is implemented as:
How can 85 percentille of the vehicles reach stop 2 in 5 minutes?
How can 85 percentille of the vehicles reach stop 3 in 7 minutes?
How can 85 percentille of the vehicles reach stop N in 30 minutes?
This results in a timetable where the "timinglink" between two stops
for each route is different.
The journey planner has to rethink its predictions in this model, for
by estimating minimal drive times.