Reference · road & bridge standards

Road Drainage and Gullies

Effective road drainage is crucial for road safety and longevity, preventing water accumulation that can lead to aquaplaning and structural damage.

Standards for road drainage specify the design and placement of gullies, channels, and pipework to efficiently remove surface water from the carriageway. These standards ensure that water is directed away from the road surface, minimizing the risk of standing water and maintaining pavement integrity. Proper drainage design also considers the impact on surrounding environments, managing runoff to prevent erosion and pollution.

Source: Design Manual for Roads and Bridges (DMRB), specifically CD 526 'Drainage' and CD 527 'Gullies and Kerb Drainage'

A reference page explaining a published road or bridge standard. It states the standard only; it makes no claim about any particular location.

Last updated 2026-08-05. This is a living record — findings are added as dated entries and prior versions remain visible.