>>2057444
Pros:
-Higher capacity
-Grade seperation for non street-running trams means bypassing traffic.
-On a vehicle per vehicle basis trams tend to be faster and enjoy quicker acceleration than busses
-Can run off overhead wires (less smog and noise from diesels, and batteries are a meme)
-Permanent transit corridor is a good shot in the arm for local businesses and property values
Cons:
-More expensive than a bus even on a rider-per-mile basis (though mileage may vary; this is based on my own amatuer inquiries into this)
-Not nearly as flexible as a bus: outside of being stuck on a fixed line, trams cannot overtake other trams, cannot be dispatched as easily to account for unforseen surges or drops in ridership, etc.
-Street running trams get caught in the same traffic as everyone else.
-Higher capacity is not as important as frequency with respect to making transit an attractive alternative to driving, or to put it another way: having a tram with 3x the capacity of a bus is a net detractor if it passes a third as often-