tunnel portal
C45552
concept
A tunnel portal is the structural entrance or exit of a tunnel where the underground passage meets the open environment, often designed to manage loads, drainage, and traffic transition.
All labels observed (1)
| Label | Occurrences |
|---|---|
| tunnel portal canonical | 3 |
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: tunnel portal
Generated description
A tunnel portal is the structural entrance or exit of a tunnel where the underground passage meets the open environment, often designed to manage loads, drainage, and traffic transition.
Instances (3)
| Instance | Via concept surface |
|---|---|
| Norton Junction side (east portal) | — |
| Brooklyn portal | — |
| Eastern Harbour Crossing Hong Kong portal | — |