This distance could be in {HEAD ~ terms} of {TAIL ~ actual road distance} in kilometers or meters  
of
This distance could be in { HEAD ~ terms } of { TAIL ~ actual road distance } in kilometers or meters
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH