Highways & Infrastructure Design Frequently Asked Questions
Our highway and infrastructure design consultants are here to answer any questions you may have, from early-stage feasibility through to detailed design and post-planning support.
What is highway design and why is it important for my development?
Highway design ensures that new access roads, junctions, and supporting infrastructure are safe, efficient, and adoptable by local authorities. For developers, it’s a critical part of gaining planning permission and ensuring schemes can be built without costly redesigns. At mode transport planning, our engineers combine technical expertise with commercial insight to deliver designs that unlock land and support long-term growth.
When should I involve highway designers in my project?
The earlier the better. Bringing us in at feasibility stage means we can assess access opportunities, identify constraints, and develop concepts that align with both planning policy and engineering standards. Early involvement reduces risks, speeds up approvals, and makes sure design solutions are commercially viable from the outset.
What types of highway design services do you offer?
We cover the full spectrum, from simple site access arrangements through to detailed S38, S104, and S278 infrastructure designs. This includes junction upgrades, internal site layouts, visibility splays, and the integration of sustainable transport measures such as cycleways and pedestrian routes. Whatever your project needs, we provide clear, buildable solutions.
How does highway design link to the NPPF?
The NPPF requires developments to achieve safe and suitable access for all users. Highway design is how this is demonstrated in practice. By ensuring schemes are safe, efficient, and connected, we help satisfy both NPPF requirements and local authority adoption standards, reducing the risk of planning refusal.
What standards and guidance do you follow in your designs?
We work to national standards such as the Design Manual for Roads and Bridges (DMRB), Manual for Streets, and Local Transport Notes, as well as each local authority’s specific requirements. Our experience across the UK means we know how to meet technical expectations while still delivering practical, cost-effective solutions.
Can highway designs really influence planning outcomes?
Absolutely. A well-prepared, policy-compliant highway design can transform the chances of securing approval. Poorly considered designs, on the other hand, often cause objections or delays. Our role is to produce designs that give planning officers and highways authorities confidence, while keeping your commercial objectives front and centre.
How do you make sure designs are adoptable?
Adoption requires meeting strict technical, safety, and maintenance criteria. We liaise closely with local highways authorities to make sure designs comply with S38 and S278 processes, reducing risk of rejection and ensuring smooth progression from planning to construction.
What is highway design and why is it important for my development?
Highway design ensures that new access roads, junctions, and supporting infrastructure are safe, efficient, and adoptable by local authorities. For developers, it’s a critical part of gaining planning permission and ensuring schemes can be built without costly redesigns. At mode transport planning, our engineers combine technical expertise with commercial insight to deliver designs that unlock land and support long-term growth.
When should I involve highway designers in my project?
The earlier the better. Bringing us in at feasibility stage means we can assess access opportunities, identify constraints, and develop concepts that align with both planning policy and engineering standards. Early involvement reduces risks, speeds up approvals, and makes sure design solutions are commercially viable from the outset.
What types of highway design services do you offer?
We cover the full spectrum, from simple site access arrangements through to detailed S38, S104, and S278 infrastructure designs. This includes junction upgrades, internal site layouts, visibility splays, and the integration of sustainable transport measures such as cycleways and pedestrian routes. Whatever your project needs, we provide clear, buildable solutions.
How does highway design link to the NPPF?
The NPPF requires developments to achieve safe and suitable access for all users. Highway design is how this is demonstrated in practice. By ensuring schemes are safe, efficient, and connected, we help satisfy both NPPF requirements and local authority adoption standards, reducing the risk of planning refusal.
What standards and guidance do you follow in your designs?
We work to national standards such as the Design Manual for Roads and Bridges (DMRB), Manual for Streets, and Local Transport Notes, as well as each local authority’s specific requirements. Our experience across the UK means we know how to meet technical expectations while still delivering practical, cost-effective solutions.
Can highway designs really influence planning outcomes?
Absolutely. A well-prepared, policy-compliant highway design can transform the chances of securing approval. Poorly considered designs, on the other hand, often cause objections or delays. Our role is to produce designs that give planning officers and highways authorities confidence, while keeping your commercial objectives front and centre.
How do you make sure designs are adoptable?
Adoption requires meeting strict technical, safety, and maintenance criteria. We liaise closely with local highways authorities to make sure designs comply with S38 and S278 processes, reducing risk of rejection and ensuring smooth progression from planning to construction.
Comprehensive Services
We offer a full suite of transport planning and highway engineering and water management services, including both transport assessment, highway and associated infrastructure design, drainage engineering and flood risk management. Our team brings clarity, efficiency and technical strength to any given project at every stage from conception to implementation.
Transport Planning
We provide tailored transport planning strategies that address access, connectivity, and movement, supporting sustainable, net zero developments and new communities from “vision led” transport planning through to onsite delivery.
Highways & Infrastructure
Our teams deliver practical, efficient highway infrastructure solutions that deliver well engineered and safe road design solutions, whilst providing a clear legible gateway for all users to our client’s new development sites.
Drainage Engineering & Flood Risk Management
We develop compliant, sustainable drainage and flood risk strategies, designed to ensure that surface water is managed sustainably and efficiently and that our solutions integrate seamlessly with our client’s development plans, site requirements and Environmental Agency guidance.
Speak to An Expert
Looking for support with your next project? Get in touch with our experienced consultants for a free, no-obligation conversation.