Folks, some bad news for trolleybus lovers. New Zealand will "retrofit" it's trolleybuses with new components that may make those individual units completely wire free. And in Philadelphia, the two former trolleybus routes in South Philly, names Tasker-Morris and Snyder Avenue will not get their wire renewed, instead 25 "electric" buses will be bought, 100% wire free and pollution free. These buses may need recharging at some charging station or stop.
So, trolleybus fans, look up and see the wires, you may not see them much longer as new technology gets developed... and the same applies to trams and streetcars.
Just in my humble opinion..