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Delighted to be shortlisted for 3 Highways Awards

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 CH2M, 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

M1 Rolling Crown

Lean Pavement Scheme

Energy efficient lighting improvement

Footbridge Renewal

Our Latest Tweet

RT @HighwaysEngland: Want to challenge your mind? Have a go at one of our activities at the #BigBangFair. #inspireanengineer…

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LATEST NEWS / 13.03.2018
Mentor of the Year

Delighted to announce our success following the Generation 4 Change (G4C) Awards Yorkshire and Humber. Collins Karanya, one of...

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LATEST NEWS / 13.03.2018
Apprenticeship of the Year

Apprentice Nicola Ward has been awarded ‘Apprenticeship of the Year Award 2018’ in the Construction (Built Environment)...

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LATEST NEWS / 09.03.2018
National Apprenticeship Week

We have been supporting National Apprenticeship Week this week by finding out what some of our apprentices are up to and why...

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LATEST NEWS / 09.03.2018
Construction Finalists

What a phenomenal start to the year, A-one+ has been shortlisted for 8 awards across 5 categories of the 2018 Committed to...

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