Even Vancouver is looking to renew its trolley bus fleet when the time comes (within the decade), not replace it with a battery-electric fleet. They're also looking at battery buses that can charge off the overhead wires as well for routes that run partly under wire (the 95 B-Line to SFU is an obvious candidate).no.
It takes years for technology to mature to a point where we will be comfortable to use. Early adopters run the risk of the technology not performing, not to mention the premium for having something that noone really knows how to install and maintain
in ample numbers. Overhead is here to stay. Lets establish the network first and then explore new tech when we have the time and money to do so.