sentences:  As the vehicle was to be used for school routes and not for transit use, the rear curbside exit was deleted (a design change also forced by regulations).In place of transit-style windows, narrower split-sash windows (required for school buses) were fitted to the body.To reinforce the body structure, Gillig added two full-length steel rails below the window line; unlike most school buses, the structure of the Phantom was additionally reinforced above the window line as well.