Vehicle and Operator Services Agency (VOSA) officers can stop commercial drivers to make roadside vehicle checks. These checks are designed to keep lorries, buses and coaches that aren’t roadworthy off the road. To find out more about roadside checks, see the guide on GOV.UK.
VOSA uses the operator compliance risk score (OCRS) to decide which vehicles to inspect. The higher the risk score, the more likely it is a vehicle will be inspected.