02/11/2026
The Construction Plant-hire Association & member representatives recently attended a roadside enforcement day on the M4 corridor nr Cardiff, that targeted abnormal load transports.
The key learnings for CPA members are:
Education before enforcement
The primary focus was safety, education & engagement. The approach was constructive, with operators given the opportunity to understand & address notification issues where possible.
Driver attitude matters
The attitude & cooperation of a driver can have a significant bearing on how regulatory enforcement officers deal with discrepancies. Every driver engaged with was courteous & receptive. Drivers left with a better understanding of the requirements & learning points.
Notification accuracy matters
A number of vehicles were identified with notification discrepancies. Most were permitted to continue once the necessary amendments had been explained & understood.
Route compliance is critical
One movement was prohibited from proceeding because it was under-notified and its used route involved crossing a weakened structure outside the notified route. Route accuracy & adherence are essential safety considerations.
Mobile crane STGO plating
Members should check that mobile cranes are correctly fitted with an STGO Part 2 vehicle plate, affixed to the machine body. A manufacturer's plate alone may not establish the permitted UK STGO axle weight allowances for road travel. Ensure the appropriate STGO plating is in place & that the crane's configuration/axle weights are compliant.
Know your notification requirements
Operators & drivers should understand the relevant notification requirements before commencing a movement. Do not assume that previous acceptance of a notification guarantees the details are correct.
Engagement creates better understanding
Engagement between drivers, enforcement officers & industry representatives provides an opportunity to clarify requirements, challenge misunderstandings constructively & improve knowledge on all sides.
Industry collaboration has real value
CPA was joined by representatives from the Heavy Transport Association & Road Haulage Association (RHA). Having cross industry representatives attend as observers, provided valuable insight into roadside enforcement practices & the challenges faced by operators. These opportunities help build relationships & ensure industry has a voice in discussions with enforcement agencies.
Overall takeaway:
Good preparation, accurate notifications, route compliance, appropriate vehicle plating & professional driver conduct all contribute to safer abnormal load movements. Enforcement days should not be seen as compliance exercises, but as valuable opportunities for education & collaboration between industry & enforcement agencies.
Thank you to Gwent Police for facilitating the opportunity and to the HTA & RHA for their participation.
Please contact CPA Policy Director Chris Cassley ([email protected]) if you have any queries.