[seanmcdirmid]

Wire attachment is a big problem even for bus line me that are fully overhead. Before the buses had batteries, a detachment often required shutting down the road and bringing out a big truck to reattach the bus.

Seattle used to run dual gas/electric (not really hybrids since no battery) in the downtown tunnel by having them attach going in and Unattach going out. Great when it worked, but it often didn’t, so they just use cleaner emission buses now instead.