Harlem Line
The Metro-North Railroad Harlem Line, originally chartered as the New York and Harlem Railroad, is an 82-mile (132 km) commuter rail line running north from New York City into eastern Dutchess County. The lower 53 miles (86 km) from Grand Central Terminal to Southeast, in Putnam County, is electrified with a third rail and has at least two tracks. The section north of Southeast, sometimes called the Wassaic Branch, is a non-electrified single-track line served by diesel locomotives. The diesel trains usually run as a shuttle on the northern end of the line, except for rush-hour express trains in the peak direction (four to Grand Central in the morning, four from Grand Central in the evening) and one train in each direction on weekends.

With 38 stations, the Harlem Line has the most of any Metro-North main line. Its northern terminal, Wassaic, is the northernmost station in the system. It is the only Metro-North line used exclusively by that carrier (no use by Amtrak, though CSX services freight customers as far north as Mount Vernon) and the only one that uses the entirety of existing track. Metro-North has assigned it the color code blue, used as trim on station signs and spot color on printed timetables. The blue color-coding appears to have started with timetables issued by predecessor New York Central for the then-Harlem Division as far back as 1965.

While the line has traditionally served to bring commuters from Westchester County to jobs in the city, since the 2000s it has begun to see more "reverse commuting" from the Bronx into Westchester and points north. The northern reaches of the line are also close enough to Western Massachusetts that residents in parts of that region are also able to commute to jobs in New York City.
Q125908
Metro-North Railroad
ORG
Q370625
New York and Harlem Railroad
ORG
Q1412403
commuter rail
Concept
Q60
New York City
LOC
Q115148
Dutchess County
LOC
Q11290
Grand Central Terminal
LOC
Q7569280
Southeast
LOC
Q115266
Putnam County
LOC
Q388201
electrified
Concept
Q748825
third rail
Concept
Q34336
diesel locomotive
Concept
Q55488
terminal
Concept
Q7972739
Wassaic
LOC
Q23239
Amtrak
ORG
Q856783
CSX
ORG
Q835831
Mount Vernon
LOC
Q1738927
color code
Concept
Q1751288
spot color
Concept
Q221725
timetables
Concept
Q1371464
New York Central
ORG
Q54066
Westchester County
LOC
Q7318218
reverse commuting
UNK
Q65122136
Western Massachusetts
PER
Q5658559
Harlem Line
LOC
Q5658559
Harlem Line
LOC
1965-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1965
DATE
2000-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
2000
DATE
+82^^http://www.w3.org/2001/XMLSchema#decimal
82
NUMBER
+132^^http://www.w3.org/2001/XMLSchema#decimal
132
NUMBER
+53^^http://www.w3.org/2001/XMLSchema#decimal
53
NUMBER
+86^^http://www.w3.org/2001/XMLSchema#decimal
86
NUMBER
+38^^http://www.w3.org/2001/XMLSchema#decimal
38
NUMBER
part of
length
terminus
terminus
instance of
located in the administrative territorial entity
instance of