Highway Design

Highway Solutions

We provide drainage designs for highways that ensure efficient surface water management and compliance.

Technical Approval Assistance

We provide robust drainage designs for new and improved highways that meet the technical standards of Section 38 and Section 278 agreements. Whether you’re working on new access roads, estate roads, or alterations to existing highways, our designs ensure efficient surface water management and ease of technical approval with Lead Local Flood Authorities (LLFAs) and adopting highway authorities.

Highways Design

We provide practical, compliant highway design solutions tailored to your development needs. Whether it’s a Section 278 design for new junctions or alterations to existing roads, or detailed layouts for access roads, private drives, or estate roads, we ensure your highways integrate seamlessly with the surrounding network. Our designs meet the requirements of the adopting authority, and we support clients through the full technical approval process—from initial concept to construction-ready drawings.

Our Highway drainage design Services

Our Highway drainage design service includes:

Highway drainage design

Surface water management

Drainage drawings and calculations

Kerb and gully design

Highway drainage tie-ins

Attenuation assessments

Flow control assessments

Highway authority submissions

Design comment responses

Construction-stage support

Every design is prepared to support safe, compliant and practical highway works associated with development access or off-site improvements.

Designed to Current Guidance

Our Section 278 drainage designs are prepared in accordance with relevant UK highway and drainage guidance, including:

Highways Act 1980
DMRB where applicable
Manual for Streets
Local Highway Authority design guidance
CIRIA SuDS Manual (C753)
Building Regulations
British Standards (BS EN)
Water company and sewerage undertaker requirements

We ensure all drainage proposals are developed in line with the technical expectations of the approving highway authority and the specific requirements of the development.

Suitable For

We provide Section 278 drainage support for:

Residential developments
Commercial developments
Industrial developments
New site access works
Junction improvements
Highway widening schemes
Public realm improvements
Local authority and developer-led highway works

Our input helps ensure highway drainage is considered early and integrated properly with the wider site drainage strategy.

Why Choose Courous?

Our engineers understand the technical demands of highway drainage, planning conditions and Section 278 approval processes. By combining practical drainage design with knowledge of highway authority expectations, we help developers progress compliant, buildable solutions that support approval and reduce the risk of costly redesign.