Why CLOCS

Almost every UK town and city has government policies to improve air quality, ease congestion and reduce obesity – encouraging more people to travel by foot and bike. This is dramatically increasing the number of people sharing the road.  Combine that scenario with increased construction activity to meet demand for more homes and infrastructure, then you also have many more heavy goods vehicles on the roads, in the community and in close proximity to people.

Air pollution affects everyone too but the most vulnerable groups like children, older people and those with heart and respiratory conditions are most affected.  In 2019 we will see the introduction of clean air zones across multiple towns and cities in the UK with aims to reduce the amount of toxic air created by vans and trucks.


463 people were killed or seriously injured in collisions involving HGVs from all sectors on GB roads in 2016. 121 of those people died within 30 days of the collision.


We know that HGVs comprise a significant part of traffic in our towns and cities.  A peak-time morning road-side survey at 14 key locations in London identified 38% of the HGVs related specifically to construction, plus a share of ‘general distribution’ HGVs.




The construction industry continues to be one of the most dangerous industries in the UK. Whilst every construction client and contractor knows their incident data within the hoardings, some still don’t know how many fatal or serious injury collisions occur on journeys associated with their own projects.

Collaborative action by regulators, procurers and site operators has reduced fatalities on site from 154 in 1990 to 39 in 2017.

Similar significant reductions in HGC - community collisions have been seen where an authority required action through progressive planning and procurement policies - achieving a 47% reduction in collisions and complaints when CLOCS was introduced.