I don't think the expresses could coast for 4.5 miles. Besides I thought the trolley wires only lasted for 1.2 miles.
Don't know about that, but it sounds logical.
I believe I have several pics of express trains with the poles up.
The expresses coasted through if they were able to get up sufficient speed. Otherwise, the conductor had to raise the pole.
Source: Dave Cope, co-producer of the record Whistles to the Jersey Shore, in a presentation to the West Jersey Chapter, NRHS, around 1980. His whole program was on the electrified line, accompanied by slides. He rode the line many times as a passenger and as a railfan.