Let a moment to look at the traditional transport in Tapanuli. Here are some images of pedicabs with a variety of forms made in Tapanuli. Pedicab or rickshaw called as "becak" in Indonesia.
Tapanuli has made pedicabs (becak) powered by engine since tens of years ago. And maybe at the beginning of making this pedicabs you still in your mother womb... :D :D :D.