Yes, as TR says we don't distribute a neutral on any of our HV lines. They can be wye connected at source, but the neutral goes no farther than that. Thus even a single-phase spur line has to be run as two phases, as you can see in a couple of those photos.
The 1-ph 3-wire 240/480V arrangement (O.K., its 230/460 officially now) is found in rural areas where the xfmr has to serve a relatively small group of homes. All neighborhoods of any size are wired with 4-wire 240/415 (230/400) wye LV.
