I'm trying to define a GTFS feed for a ferry crossing between 2 ports (A <-> B). There may be 2 ferries running between these ports.
routes.txt
route_id,route_short_name,route_long_name,route_desc,route_type
AB,A-B,A << >> B,Ferry travelling between A and B,4
calender.txt
service_id,monday,tuesday,wednesday,thursday,friday,saturday,sunday,start_date,end_date
FULLWEEK,1,1,1,1,1,1,1,20180103,20180430
trips.txt
route_id,service_id,trip_id,trip_headsign,direction_id,shape_id,wheelchair_accessible,bikes_allowed
AB,FULLWEEK,a_b,B Dest,0,ab_shape,1,1
AB,FULLWEEK,b_a,B Dest,1,ab_shape,1,1
stops.txt
stop_id,stop_name,stop_desc,stop_lat,stop_lon,location_type
A,B-A,Travelling from B to A,xxxx,xxxx,1
B,A-B,Travelling from A to B,xxxx,xxxx,1
stop_times.txt
trip_id,arrival_time,departure_time,stop_id,stop_sequence
a_b,02:45:00,03:00:00,A,1
a_b,04:45:00,05:00:00,A,1
b_a,00:45:00,01:00:00,B,2
b_a,03:45:00,04:00:00,B,2
^^ this is where the errors appear in the feed validator
Duplicate stop_sequence in trip_id a_b
I can't work if I should be using 2 routes instead of 1 (and stop using the direction_id value in trips.txt) and what the sequence of the timetables are, since the timetables at both ports may not match up as a sequence as there may be multiple ferries running between the 2 ports.
Thank you.
Figured it out, basically trips.txt must contain an entry for every scheduled departure. I was treating trips like routes, when in fact every departure is it's own "trip".