A man in a hurry who is concerned that his address might already be known to the FBI through the rooming house phone number.
Flawed logic! It's hardly unlikely that such a man would ever decide to wait at a bus stop so close to the roominghouse in the first place.
So reduce his waiting time to 15 secs. Once he realised he was exposed like a shag on a rock outside the rooming house he knew he needed to get out of that area altogether. He had three choices really;
1. go back inside and wait to be arrested
2. continue to wait for a bus with the risk of a patrol car racing toward him or
3. hot foot it out of the area until he could find a place to hid then form a plan.