The usual Indonesian forms of transport – bemo or angkot (small minibus), becak (motorcycle-rickshaw or bicycle-rickshaw) and bendi (two-person horse-drawn cart) – are available in Sumatran towns and cities. Establish a price for a becak ride before climbing aboard. For an angkot, you pay after you disembark.
For midrange and shorter journeys, many locals and travellers prefer to use minibus and shared car services, which can be more convenient than hustling out to the bus terminal as they run intercity and door-to-door. They are not necessarily faster, but more comfortable and convenient.