They did this where I lived in Sweden too. The city wanted a tram line, but couldn't afford it. So they built a bus line. Bought massive triple bendy busses. Even used tram signals at the stoplights. Worked great.
Same in Finland(Helsinki) as well. Its called the joker line, huge busses that go every 8-10 mins. Now theyre actually trying to replace it with a fast tram.
Similar in the Netherlands, plans for a tram line, turned out to be to expensive, got changed to bus line with dedicated lanes. Even though it was built to make an eventual transition to a tram easy, this seems to work better in hindsight than dedicated trams.
