---
title: "CS ADR-DSN.B.055 Minimum distance between parallel instrument runways — Certification Specifications and Guidance Material for Aerodrome Design (CS-ADR-DSN) — Issue 7, Aerodromes · Avioverse"
description: "Where parallel instrument runways are intended for simultaneous use, the minimum distance between their centre lines should be:"
url: "https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-b-runways/cs-adr-dsn-b-055"
---

# CS ADR-DSN.B.055 Minimum distance between parallel instrument runways

Certification Specifications and Guidance Material for Aerodrome Design (CS-ADR-DSN) — Issue 7 · Regulation (EU) No 139/2014 · EAR revision 13 Mar 2026

IR Implementing rule

## CS ADR-DSN.B.055 Minimum distance between parallel instrument runways

(a) Where parallel instrument runways are intended for simultaneous use, the minimum distance between their centre lines should be:

(1) 1 035 m for [independent parallel approaches](https://avioverse.aero/glossary/easa/independent-parallel-approaches);

(2) 915 m for [dependent parallel approaches](https://avioverse.aero/glossary/easa/dependent-parallel-approaches);

(3) 760 m for [independent parallel departures](https://avioverse.aero/glossary/easa/independent-parallel-departures); and

(4) 760 m for [segregated parallel operations](https://avioverse.aero/glossary/easa/segregated-parallel-operations).

(b) Apart from provided in (a) above, for segregated parallel operations the specified minimum distance:

(1) may be decreased by 30 m for each 150 m that the arrival [runway](https://avioverse.aero/glossary/easa/runway) is staggered toward the arriving [aircraft](https://avioverse.aero/glossary/easa/aircraft), to a minimum of 300 m; and

(2) should be increased by 30 m for each 150 m that the arrival runway is staggered away from the arriving aircraft.

(c) Other combinations of minimum distances should apply taking into account ATM and operational aspects.

\[Issue: ADR-DSN/3]

IR · CS ADR-DSN.B.055 — Regulation (EU) No 139/2014 · ED Decision 2016/027/R · Aerodromes Easy Access Rules · EAR revision 13 Mar 2026

[All rules in CHAPTER B — RUNWAYS](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-b-runways)

Consolidated from the EASA Easy Access Rules (revision 13 Mar 2026, extracted 13 Oct 2026) for convenience. Not the official publication — verify against the Official Journal of the European Union and the EASA publications before operational use.