[PRCo] Inbound // Outbound

[Phillip Clark Campbell]

This is a  'curiosity'  item -- trivia question -- even  'nit-picking'  inquiry.  Direction
of trolleys on  'city routes'  generally inbound heading to downtown hub and outbound
heading away from the same.  What about Interurbans?  By definition they travel
between at least two  'cities'  don't they so direction could be considered  'relative to'
any one of them.  Bottom line would find the Interurbans based in one city so direction
could be considered relative to it -- i.e., the PRC Washington Interurban would be
'Inbound'  heading to Pgh. because that is where the interurban is based.

Is there any  'official'  protocol for designating interurban direction?
Is compass direction preferred for interurbans?


Phil