>>1373642Trolleybusses
>network construction/expansion is cheaper (no rails) >can go up steep hills better (rubber tire rolling resistance) >easier to reroute >more flexible (can be fitted with auxiliary motors and go off the grid for short distances) Trams
>cheaper to maintain and operate >can fit more people >rail bonus attracts more passengers >more energy efficient (low rolling resistance on rails) >more comfortable to ride >pantograph less prone to malfunction than trolleypoles All in all, I'd rather have trams for all their advantages listed above. The lower cost (once the network is there), higher capacity and riding comfort are crucial in my opinion. But there are definitely contexts where trolleybusses have a clear edge over trams, such as very hilly places, and I'd take them over diesel or fucking battery busses any day.