| 1 | A | B | C | D | E | F |
| --- | --- | --- | --- | --- | --- | --- |
| 2 | New York City Subway chaining - Current |  |  |  |  |  |
| 3 | Chaining line | Physical line | North | South | Chaining zero | Mileage zero |
| 4 | B | Broadway–Seventh Avenue Line | 96th Street | Times Square–42nd Street (ties to IRT MM) | Brooklyn Bridge–City Hall | New Lots Avenue |
| 5 | BB | Broadway–Seventh Avenue Line | Van Cortlandt Park–242nd Street | 96th Street | 96th Street | New Lots Avenue |
| 6 | C | Flushing Line | Flushing–Main Street | Times Square | Times Square | Times Square |
| 7 | CC | Flushing Line | 34th Street–Hudson Yards | Section opened after mileage system fell into disuse. | Times Square | - |
| 8 | D | Nostrand Avenue Line | Franklin Avenue (ties to IRT E) | Flatbush Avenue–Brooklyn College | Brooklyn Bridge–City Hall | New Lots Avenue |
| 9 | E | Eastern Parkway Line / New Lots Line | Borough Hall (ties to IRT M) | - | Brooklyn Bridge–City Hall | New Lots Avenue |
| 10 | F | Lenox Avenue Line / White Plains Road Line | 180th Street–Bronx Park (demolished) | 96th Street | 96th Street | New Lots Avenue |
| 11 | J | Jerome Avenue Line | Woodlawn | 125th Street/Lexington Avenue (ties to IRT L) | Park Avenue/38th Street | New Lots Avenue |
| 12 | K | Broadway–Seventh Avenue Line / Clark Street Tunnel | Chambers Street (ties to IRT V) | Borough Hall | Broadway/44th Street | New Lots Avenue |
| 13 | L | Lexington Avenue Line | 125th Street/Lexington Avenue | Grand Central–42nd Street | Park Avenue/38th Street | New Lots Avenue |
| 14 | M | Lexington Avenue Line / Joralemon Street Tunnel | Brooklyn Bridge–City Hall | Borough Hall | Brooklyn Bridge–City Hall | New Lots Avenue |
| 15 | MM | 42nd Street Shuttle / Lexington Avenue Line | Times Square | - | Brooklyn Bridge–City Hall | New Lots Avenue |
| 16 | MV | South Ferry loops | Bowling Green | Bowling Green | Bowling Green | New Lots Avenue |
| 17 | P | Pelham Line | Pelham Bay Park | 125th Street/Lexington Avenue (ties to IRT L) | Park Avenue/38th Street | New Lots Avenue |
| 18 | V | Broadway–Seventh Avenue Line | Times Square–42nd Street | north of South Ferry loops | Broadway/44th Street | New Lots Avenue |
| 19 | VA | Broadway–Seventh Avenue Line | south of Rector Street (ties to IRT V) | South Ferry (new station) | Broadway/44th Street | Section opened after mileage system fell into disuse. |
| 20 | W | White Plains Road Line | Wakefield–241st Street | West Farms Square–East Tremont Avenue (ties to IRT F) | 96th Street | New Lots Avenue |
| 21 | Y | Dyre Avenue Line | Eastchester–Dyre Avenue | East 180th Street | 132nd Street and Willis Avenue | New Lots Avenue |

Question: At what intersection in New York' city's subway is the chaining where dual contracts a section of Lexington avenue line?
Answer: In New York City Subway chaining, Park Avenue/38th Street: The point where the Dual Contracts section of the Lexington Avenue Line (from Grand Central–42nd Street).