Travel time not available for corridor but works for all segments of same corridor

[Nate-Wessel]

To reproduce the issue:
bug.csv

[Nate-Wessel]

The 80% rule is applied at the level of hourly observations. There's no single hour where someone drove across the whole corridor, but there are hours where people drove through the parts of the corridor. Not the same hours though!

[Nate-Wessel]

Related to #100. Almost certainly the same thing going on there.