---
title: "GM1 ADR-DSN.D.280 Transverse slopes on taxiways — Certification Specifications and Guidance Material for Aerodrome Design (CS-ADR-DSN) — Issue 7, Aerodromes · Avioverse"
description: "The slopes on a taxiway are intended to prevent the accumulation of water (or possible fluid contaminant) on the surface and to facilitate rapid drainage…"
url: "https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-d-taxiways/gm1-adr-dsn-d-280"
---

# GM1 ADR-DSN.D.280 Transverse slopes 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

GM Guidance material

## GM1 ADR-DSN.D.280 Transverse slopes on taxiways

The slopes on a [taxiway](https://avioverse.aero/glossary/easa/taxiway) are intended to prevent the accumulation of water (or possible fluid contaminant) on the surface and to facilitate rapid drainage of surface water (or possible fluid contaminant). Slopes should be so designed as to minimise impact on [aircraft](https://avioverse.aero/glossary/easa/aircraft) and so not to hamper the operation of aircraft.

GM · GM1 ADR-DSN.D.280 — 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.