The following components are currently hardcoded to imperial units through call to humanizeDistanceString() and should support output to metric units:

• AccessLegSummary (package itinerary-body)
• AccessLeg (package printable-itinerary)
• TransitStopOption (package location-field)

EDIT: Other components may still have to be modified to support metric application-wide, and they will have to be covered under separate issues.