Example for adult within 1 zone:
If you travel more than four times within a zone per week, it is more economical to purchase a period ticket instead of single tickets.
Single ticket 50 NOK x 4 trips x 4 weeks = 800 NOK.
Period ticket 30 days costs 777 NOK.
Example for adult within 2 zones:
If you travel more than three times within two zones per week, a period ticket is also the better option.
Single ticket 96 NOK x 3 trips x 4 weeks = 1188 NOK.
Period ticket 30 days costs 1113 NOK.