Trams are a terrible idea. Who actually thought it was a good idea to take a train and put it on a road? Whenever a regular train crosses a roadway, you have to have bells and lights and barriers to warn drivers that it's coming. That's because trains are big, you can't steer them, and you can hardly stop them. They're designed to run on dedicated tracks where they can only go in one direction. And if someone walks out on the tracks in front of you, apart from blowing your horn at them and hope they notice you, you as a conductor can effectively do nothing but look on.
Meanwhile, road traffic especially in cities is busy and full of cars, cyclists and pedestrians going every which way. Now add to that that you're gonna be sharing a lane with a TRAIN. What happens when there's a red light? Can't stop. Sorry, everyone else. Mum crosses the street with her stroller and doesn't see you coming? Oops. All of the accidents that happen with trams speak for themselves. Did you know 48 % of all pedestrian injuries and fatalities in Gotheburg were caused by trams? 52% for all the other vehicles combined. How many trams are there in comparison?
The perfect urban transit method has already been invented and it's called a bus. All problems the tram "solves", all of its supposed advantages are done better by BRTs, buses (can go anywhere on the road, don't need dedicated tracks) and metro trains (carry more people faster over longer distances). There is simply no argument to be had for trams. They are a nostalgic gimmick at best.