Trondheim has a well developed bus (http://www.atb.no) network, covering nearly all of the city. There are frequent departures during the day, less frequent during evenings. On weekend nights, a comprehensive night bus system runs from the terminus in Olav Tryggvasons gate, close to the action.
Here (http://www.atb.no/getfile...) is a map of the system.Here (http://www.atb.no/ruter-i...) you can find links to the time schedules in PDF.A Night service map (http://www.team-trafikk.n...) is here in PDF. Remember, these only run nights after Friday and Saturday.
Tickets are bought from the driver, and are NOK 40 for single tickets NOK 20 for under 16's. A day pass is NOK 80, while the night bus costs NOK 70 day pass not valid. You can buy prepaid tickets at some convenience stores Narvesen, 7/Eleven and Deli de Luca and selected parking meters. These tickets are cheaper than buying with cash from the driver.
One tram (http://www.graakallbanen.no/) line operates from St. Olavs gate near the centre to Lian, up in the Bymarka forests. It operates on the same fare schedule, so day passes are valid. The tram is the nothernmost tram service in the world.
The resort island of Munkholmen (http://www.munkholmen.no/...), ideal for swimming, sunbathing or a peek at the old monastery, can be reached by boat from Ravnkloa every hour in summer. Make sure you don't miss the last boat home in the evening! A two way ticket costs NOK 70 for adults, NOK 40 for children and NOK 40 for strollers. Cash only.
Local trains (http://www.nsb.no/getfile...) can also be used within the city boundaries between stations Rotvoll and Lerkendal/Heimdal. Sadly, these are no longer part of the common public transport fare system, so day passes are not valid. Buy single tickets from the station clerks or the conductor on the train.
If you want to find anywhere in Trondheim, try the Yellow Pages website (http://www.gulesider.no). The maps have more detail than a certain popular map website, and are very useful if you've heard the name of a place, but don't know where it is.
