APPG Reports

Warm Mix Asphalt: Reducing carbon emissions and improving efficiencies │ September 2019

All-Party Parliamentary Group report highlighting how the use of Warm Mix Asphalt (WMA) can reduce carbon emissions and improve efficiencies on highways projects.

All-Party Parliamentary Group on Highways report:
Managing a Valuable asset: improving local road condition │ October 2013

APPG published report calling for urgent action to counteract the deterioration of local roads. The APPG considered that “…urgent action is needed to counteract the obvious deterioration of the local roads, that are vital to everyone’s daily existence and which account for more than 95 per cent of the country’s network.”

Industry Reports

Asphalt Industry Alliance report:
Annual Local Authority Road maintenance survey (ALARM) survey │ March 2022

Every year the Asphalt Industry Alliance (AIA) commissions an independent survey of local authority highway departments in England (including London) and Wales. The Annual Local Authority Road Maintenance (ALARM) survey provides detailed insight into the funding and conditions of the local road network, based on information provided directly by those responsible for its maintenance.

Now in its 27th year, ALARM 2022 reports that, despite a 4% increase in average highway maintenance budgets, less is being invested in the carriageway itself. As a result, the reported backlog of carriageways repairs has increased by almost a quarter to £12.64 billion – that’s £61,700 for every mile of local road in England and Wales – and will take nearly a decade to complete.

For previous years ALARM reports, go to:

RoadFile (published biennially)

RoadFile provides a credible source of information for UK road-related statistics. It offers a useful hub of collated data to highlight the important role the road network plays in keeping communities connected and in supporting the economy.

YouGov reports: The economic impact of local road condition │ October 2010

Research commissioned by the AIA in 2010 which “…analyses the impact of poorly maintained roads on the public and on small and medium sized businesses (SMEs) in England and Wales.”


ALARM Survey reports local roads repair backlog tops £12 billion │ 22 March 2022

The backlog of carriageway repairs to fix local roads in England and Wales has reached £12.64 billion, compounded by increased costs caused by rising inflation, reports this year’s Annual Local Authority Road Maintenance (ALARM) survey.

The ALARM survey, published by the Asphalt Industry Alliance (AIA), highlights the scale of the worsening issue faced by highway engineers who have to make difficult choices about keeping local roads open and safe versus improving overall conditions. The Executive Summary and infographics at a Glance can be viewed at:

The full ALARM survey report is available to download at:

“Making Warm the Norm” – the case for Warm Mix Asphalts bolstered by award nomination │ 15 February 2022

Asphalt Industry Alliance (AIA) partners – MPA Asphalt (Mineral Products Association) and Eurobitume UK – in conjunction with National Highways – secured a nomination for a prestigious sustainability award.

More information on the benefits of WMAs can be viewed here.

A short video on WMAs can also be viewed at:

Paving the way for lower carbon roadworks │ 18 August 2021

The Government’s low carbon agenda has moved another step forward with today’s announcement by Highways England to encourage the use of Warm Mix Asphalts (WMAs) as standard on our key routes.

The Asphalt Industry Alliance (AIA), which represents the asphalt industry, welcomes the move which could help cut the CO2 emissions associated with asphalt production by up to 15%*.

* Using WMAs can reduce CO2 emissions associated with asphalt production by around 15% depending on specific product and plant.

Road statistics provide food for thought │ 5 February 2021

Updated road-related statistics are now available to view on RoadFile at:

Covering topics from road network lengths and funding to traffic volume and regional trends, RoadFile is a hub for publicly available data and is delivered by the Asphalt Industry Alliance (AIA).

AIA Chair, Rick Green said: “RoadFile is a one-stop resource for some of the latest data from sources such as the DfT and Eurostat. Being able to analyse the data sets alongside allows users to review trends and will provide a great deal of food for thought for those across the highway sector.”

Links to further resources