---
title: "CS ADR-DSN.D.270 Longitudinal slope changes on taxiways — Certification Specifications and Guidance Material for Aerodrome Design (CS-ADR-DSN) — Issue 7, Aerodromes · Avioverse"
description: "The safety objective of limiting the longitudinal taxiway slope changes is to avoid damage of aircraft and to enable safe use of taxiway by an aircraft."
url: "https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-d-taxiways/cs-adr-dsn-d-270"
---

# CS ADR-DSN.D.270 Longitudinal slope changes on taxiways

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.270 Longitudinal slope changes on taxiways

(a) The safety objective of limiting the longitudinal [taxiway](https://avioverse.aero/glossary/easa/taxiway) slope changes is to avoid damage of [aircraft](https://avioverse.aero/glossary/easa/aircraft) and to enable safe use of taxiway by an aircraft.

(b) Where slope changes on a taxiway cannot be avoided, the transition from one slope to another slope should be accomplished by a curved surface with a rate of change not exceeding:

(1) 1 % per 30 m (minimum radius of curvature of 3 000 m) where the code letter is C, D, E, or F; and

(2) 1 % per 25 m (minimum radius of curvature of 2 500 m) where the code letter is A or B.

(c) Where slope changes in (b)(1) and (2) are not achieved and slopes on a taxiway cannot be avoided, the transition from one slope to another slope should be accomplished by a curved surface which should allow the safe operation of all aircraft in all weather conditions.

IR · CS ADR-DSN.D.270 — 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.