Paul I can not speak for utility or city owned street lighting, but I do install privately owned street and parking lot lighting.
We will use the highest voltage available, for us most times 480 is available.
If not 240 or 208, almost never 120 volt, to much voltage drop and the conductors get to large.
We will not have 120 in the raceway unless the plans call for outlets.
If the circuit length is long we will put a transformer in the pole base to make 120 volts from a separate 480 feed.
