subway line extension
C24427
concept
A subway line extension is an added segment of track and stations that lengthens an existing subway route to serve new areas and increase transit capacity.
All labels observed (10)
| Label | Occurrences |
|---|---|
| rapid transit line extension | 2 |
| Bay Area Rapid Transit extension | 1 |
| London Underground line extension project | 1 |
| New York City Subway extension | 1 |
| SkyTrain extension | 1 |
| Washington Metro expansion project | 1 |
| railway line extension | 1 |
| subway line extension canonical | 1 |
| subway line extension project | 1 |
| supplementary metro line | 1 |
Description generation (CDg)
The one-sentence description above was generated by prompting gpt-5.1 with the class name and this instruction.
Instruction
generate a one-sentence description for a given conceptual class. # Response Format Return only the sentence: "Description: [one-sentence description of the conceptional class]"
Input
Class: subway line extension
Generated description
A subway line extension is an added segment of track and stations that lengthens an existing subway route to serve new areas and increase transit capacity.
Instances (10)
| Instance | Via concept surface |
|---|---|
| Northern line extension to Battersea | London Underground line extension project |
| Toronto Transit Commission Line 1 extension | — |
| Archer Avenue Subway | New York City Subway extension |
| BART Silicon Valley extension | Bay Area Rapid Transit extension |
| Green Line southern extension | Washington Metro expansion project |
| Metro Red Line extension to North Hollywood | rapid transit line extension |
| 7 Subway Extension | railway line extension |
| Evergreen Extension | rapid transit line extension |
| Scarborough Subway Extension of Line 2 Bloor–Danforth | subway line extension project |
| U7 | supplementary metro line |