---
title: "CS ADR-DSN.D.250 Taxiways curves — Certification Specifications and Guidance Material for Aerodrome Design (CS-ADR-DSN) — Issue 7, Aerodromes · Avioverse"
description: "Changes in direction of taxiways should be as few and small as possible."
url: "https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-d-taxiways/cs-adr-dsn-d-250"
---

# CS ADR-DSN.D.250 Taxiways curves

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.D.250 Taxiways curves

(a) Changes in direction of taxiways should be as few and small as possible. The radii of the curves should be compatible with the manoeuvring capability and normal taxiing speeds of the aeroplanes for which the [taxiway](https://avioverse.aero/glossary/easa/taxiway) is intended.

(b) The design of the curve should be such that when the cockpit of the [aeroplane](https://avioverse.aero/glossary/easa/aeroplane) for which the taxiway is intended remains over the taxiway centre line markings, the clearance distance between the outer main wheels of the aeroplane and the edge of the taxiway should be not less than those specified in CS ADR-DSN.D.240.

IR · CS ADR-DSN.D.250 — Regulation (EU) No 139/2014 · ED Decision 2014/013/R · Aerodromes Easy Access Rules · EAR revision 13 Mar 2026

[All rules in CHAPTER D — TAXIWAYS](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-d-taxiways)

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.