polyline handling is hard

	# majority of trips do not pass the same stop multiple times, it's better

	# to risk having a few inaccurate distances than not calculating the

	# distance for any journey that lacks sched_dep/rt_dep or

	# schep_from/rt_from.

	# sched_from/rt_from.

	my @route = after_incl {

		(

			( $_->[1] and $_->[1] == $from_eva or $_->[0] eq $from )

		return ( 0, 0, $distance_beeline );

	}

	# TODO this always selects the first stop entry.

	# Gotta count how many duplicates we need to skip...

	# Approach: build dict route id -> polyline id of corresponding stop

	# (and bail out if route stops ≠ polyline stops),

	# then find indexes from route and select polyline range from those

	my @polyline = after_incl { $_->[2] and $_->[2] == $from_eva }

	@{ $polyline_ref // [] };

	@polyline