---
title: "CS ADR-DSN.D.330 Slopes on taxiway strips — Certification Specifications and Guidance Material for Aerodrome Design (CS-ADR-DSN) — Issue 7, Aerodromes · Avioverse"
description: "The safety objective of limiting the longitudinal taxiway strip slopes and slope changes and of minimum sight distances values is to reduce the…"
url: "https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-d-taxiways/cs-adr-dsn-d-330"
---

# CS ADR-DSN.D.330 Slopes on taxiway strips

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.330 Slopes on taxiway strips

(a) The safety objective of limiting the longitudinal [taxiway strip](https://avioverse.aero/glossary/easa/taxiway-strip) slopes and slope changes and of minimum sight distances values is to reduce the probability of damage to an [aircraft](https://avioverse.aero/glossary/easa/aircraft) accidentally running off the [taxiway](https://avioverse.aero/glossary/easa/taxiway) and to enable safe use of these areas by rescue and firefighting vehicles.

(b) The surface of the strip should be flush at the edge of the taxiway or [shoulder](https://avioverse.aero/glossary/easa/shoulder) if provided, and the graded portion should not have an upward transverse slope exceeding:

(1) 2.5 % for strips where the code letter is C, D, E, or F; and

(2) 3 % for strips of taxiways where the code letter is A or B;

the upward slope being measured with reference to the transverse slope of the adjacent taxiway surface and not the horizontal. The downward transverse slope should not exceed 5 % measured with reference to the horizontal.

(c) The transverse slopes on any portion of a taxiway strip beyond that to be graded should not exceed an upward or downward slope of 5 % as measured in the direction away from the taxiway.

IR · CS ADR-DSN.D.330 — 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.