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2 million working hours without a reportable accident in Area 4. Aiming for zero AFR.

Introducing integrated highway engineering provider A-one+.
We have the capabilities to design, construct and operate thousands of miles of road networks.
A-one+ works as one team delivering highway excellence.
Discover exactly what we do for your road network by viewing our capabilities and solutions now.

What we do

About Us

A-one+ is a key group of integrated highway engineering providers, having been established by industry leaders Jacobs, Colas and Costain.


You can depend on our capabilities to provide a quality integrated highway service and our solutions to develop pioneering industry innovation.


People are our most important asset. Being un-incorporated means that parent company expertise and support for our employees plays a vital role in our success.

We offer a wide range of services, click the button to find out more

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Our Solutions

Innovative Noise and Restraint Barrier

M23 Concrete Replacement Scheme

Embedding Customer Principles

Two Full-Width Lane Paving

LATEST NEWS / 25.03.2019
Air and Noise Monitoring Stations

Helping Highways England build a clearer picture of air and noise quality. Following a short 7-day programme, we have...

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LATEST NEWS / 18.03.2019
Highest Lean Score!

A-one+ underwent a Highways England Lean Maturity Assessment (HELMA) this week and has been accredited with a 3.3 HELMA score. It...

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LATEST NEWS / 11.03.2019
Noise Barrier Collaborative Learning Event

A-one+, Highways England and supply partner VeRSco co-hosted a collaborative learning event to showcase the pioneering combined...

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LATEST NEWS / 11.03.2019
Well Done Tim!

The 5th annual Generation 4 Change (G4C) Yorkshire and Humber awards took place last Friday where Tim O’Connor, Asset...

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