A typical diesel or natural gas city bus has a curb weight between 20,000 and 33,000 lbs[1]. An electric bus I found lists a curb weight of 28,000 lbs[2]. It doesn't seem like extra road wear is going to be a major issue.

[1] https://onlinepubs.trb.org/onlinepubs/tcrp/docs/TCRPJ-11Task...

[2] https://www.fotonmobility.com.au/electric-city-bus-12-5m