a 'traveling companion' [=a person who goes with you when you travel somewhere]
The car was 'traveling' at a very high (rate of) speed.
That car was really 'traveling' when it passed us.
(..) ''The brave may not live forever... ''but the cautious do not live at all. ''From now on, you'll be traveling the road... ''between who you think you are... ''and who you can be. ''The key is to allow yourself to make the journey. (..)2001 The Princess Diaries