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Celebrating a landmark five million hours reportable incident free in Area 12

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

A64 Carriageway Renewal Team

Ouse Bridge Safety Mock Up

Cusworth Park and Gardens Preservation

Integrated Area Programme

LATEST NEWS / 17.07.2020
Environmental Recognition

A-one+ has been awarded the Costain Resource Efficiency Matrix Gold Certificate for reducing our impact on the environment and...

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LATEST NEWS / 02.07.2020
Five Million Hours

Consistent and rigorous efforts to eliminate risk is paying off for A-one+ in Area 12. The team which carries out work on behalf...

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LATEST NEWS / 07.02.2020
Four Million Milestone

As of 31 January 2020, our Area 12 team reached four million working hours and two years without a reportable incident, a direct...

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LATEST NEWS / 14.01.2020
Busy start to 2020

Happy new year to everyone and welcome to 2020. We have a busy three months ahead starting several large schemes from now until...

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