Trolleybus Trolleybus Trolleybuses are buses which run on electricity drawn from overhead wires. Only a few American cities use trolleybuses, but others have examined the possibility of adopting trolleybuses.
Trolleybuses run on electricity which is usually bought from local utility companies.
There are virtually no emissions from the vehicles themselves, which are also noticeably quieter than diesel buses. One transit agency bought a fleet of dual-mode buses which run as trolleybuses in the city center and on major streets equipped with trolley wires. Then they run on local streets using diesel engines. This combination of technologies provides greater flexibility than the conventional trolleybus, but the added weight of two sets of motors reduces energy efficiency.