Bill: Do you know where Oswald's "usual" bus stop was located when he left work or arrived by bus each morning? I read (I believe in Bugliosi) that it was on Houston Street just around the corner from the TSBD?
Also: Were there any bus stops between the route he took from the TSBD to the bus he boarded? In other words, couldn't he have walked several blocks to a bus stop and simply waited for one? No need to keep walking and then pound on the door to get onto one.
Steve, there was a bus stop at Houston and Elm on the northeast corner of that intersection. To the best of my recollection, the busses that stopped at that corner (heading west on Elm through town towards Dealey Plaza) would continue straight onto Elm and go underneath the triple underpass.
However, the route that the bus that McWatters was driving that day (the bus boarded by Oswald after the assassination) had a stop at Elm and Record (one small block east of the other busses that stopped at Elm and Houston that I described above). Instead of continuing straight on Elm and going underneath the triple underpass like the busses I describe above, the busses that stopped at Elm and Record would then continue west on Elm for a block and turn left onto Houston and take the Houston Street viaduct over to Oak Cliff.
Some of the busses, after crossing the viaduct into Oak Cliff, would then head south on Marsalis and other busses would stay on Zang (immediately after crossing the viaduct) to Beckley.
Long story short; after work, Oswald could leave the Depository building, walk one full block east on Elm to the intersection of Elm and Record. At that bus stop (Elm and Record) Oswald would wait for the Beckley line (as opposed to the Marsalis line) to take him to the rooming house.
I hope this helps.