HTMA members provide a diverse range of services to the industry from highway maintenance and civil engineering, through to street lighting, routine repairs and gritting plus many more. The HTMA membership has a combined turnover of more than £3 billion, over 20,000 employees and maintains approximately 200,000 km of highway across Britain.

The current Full and JV Members are:
Aecom, Amey, Atkins, Balfour Beatty, BEAR Scotland, Carillion, CH2M, Colas, ConnectPlus, Costain, FM Conway, GallifordTry, Jacobs, Kier Services, Mott MacDonald, Ringway, Ringway Jacobs, Skanska, Tarmac, VolkerHighways, WSP.

The current Associate Members are:
Aggregate Industries, Asphalt RS, Compass Minerals UK, DBI Services, Kiely Bros Ltd,  Road Maintenance Services Ltd, Saint-Gobain PAM, Virtus Traffic Management Solutions, WJ.