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According to ICAO Annex 14, how will the addition of a stopway affect the four declared distances? It increases the...

  • A
    ASDA and TORA, while the TODA and LDA remain unchanged.
  • B
    LDA, while the ASDA, TORA, and TODA remain unchanged.
  • C
    ASDA, while the TORA, TODA, and LDA remain unchanged.
  • D
    ASDA, TORA, and TODA, while the LDA remains unchanged.

Refer to figure.
ICAO Annex 14 
Volume 1 
Declared distances.

a) Take-off run available (TORA). The length of runway declared available and suitable for the ground run of an aeroplane taking off. 
b) Take-off distance available (TODA). The length of the take-off run available plus the length of the clearway, if provided. 
c) Accelerate-stop distance available (ASDA). The length of the take-off run available plus the length of the stopway, if provided.

d) Landing distance available (LDA). The length of runway which is declared available and suitable for the ground run of an aeroplane landing.

Chapter 1

Stopway. A defined rectangular area on the ground at the end of take-off run available prepared as a suitable area in which an aircraft can be stopped in the case of an abandoned take-off.

SUMMARY: 
TORA = Take-off run available 
TODA = TORA + CWY (Clearway) 
ASDA = TORA + STW (Stopway) 
LDA = TORA - Displaced threshold

Therefore, the addition of a stopway will increase the ASDA only.

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