Behind the Quality Inn near New York Avenue and 16th Street the
former railroad foes joined to begin sharing the route into downtown;
for MARC commuters the two lines go by the named Camden and Penn.
Emerging from behind the motel on the Camden Line is CSX 3061 in
"Rock Runner" duty. As you might reason, "rock runner" is a generic
name for a train that rolls crushed stone from mines to various
Initially the B&O had a monopoly on railroad service to Washington,
but eventually the Pennsy muscled in. Each RR had its own station,
making the downtown area and Mall busy with steam engines, unsightly
steam engines according to the politicians.
In 1900 they "encouraged" the railroads to build a single, joint station,
and in 1907 Union Station opened. Both the B&O and Pennsy constructed
new approaches to the station, and for the next 3 or so miles the
tracks of the two competitors run adjacent.