Two cities can only be linked effectively by rail when there aren't stops between them. That's impossible in America, where suburban areas are the political battlegrounds while cities are single-party fiefdoms.
Two cities can only be linked effectively by rail when there aren't stops between them. That's impossible in America, where suburban areas are the political battlegrounds while cities are single-party fiefdoms.
What happened is that, historically, Baltimore-Washington was mainly served by the B&O, whose Baltimore station would have been right next to Inner Harbor (Camden Yards is essentially built on old railroad property). When passenger service was consolidated into Amtrak, the Northeast Corridor instead chose to use Pennsylvania Railroad trackage instead of B&O from DC to NYC, and the freight trackage in the corridor consolidated onto the B&O tracks instead. The resulting residual commuter rail line has the standard commuter rail/freight rail politics going on that limits the number of trains that can transit the route.
[0] https://www.google.com/maps/place/University+of+Baltimore+-+...
[1] https://www.google.com/maps/place/Penn+Station/@39.3071436,-...
99% of all the light rail "lines" ride the same track. The Penn-Camden "line" veers off the main tracks right at that Mt Royal stop (MICA/UB), and only goes to Penn, then back to the main line at Mt Royal, then headed to Camden Yards. It's probably the least common "line" to see.
That's really not a lot, especially between major cities.
Comparing trains from London is not really fair because virtually every train in the south ends up in London eventually. Somewhat tragically, I once tried to take a train from Watford to visit Hatfield House, some 14 miles away. I think it took me 3 hours getting in and out of London :-)
You really have to look at the metro population.
OTOH between Macon (pop 34000) and Lyon (pop 500000) there is up to 4 trains / hour at commute times (1 an hour otherwise), over a slightly longer distance.
This is depressingly familiar situation in the UK too (not sure about the rest of Europe). Usually, it's not politics that prevent more useful connections being made, but a lack of investment to do the necessary small bits of engineering.
As a consequence trains from Baltimore run a bit more often then once an hour - though I don't take Camden Line (It's for losers) so I don't know what the overlap is exactly.
Why is this? Full of tourists?