To help reduce production costs, the same room is used for both Clark Kent's office and Lois Lane's office.
When Clark Kent is waiting at curbside in front of the City Morgue, he looks up and sees Lois lying on the floor of her office. Clark then runs across the street, the same side as the Daily Planet and changes into Superman in an alley. They Superman flying across the city when he was already at the Daily Planet building.