go to the next emergency telephone and report the hazard
Lorry drivers can be unaware of objects falling from their vehicles. If you see something fall onto a motorway look to see if the driver pulls over. If they don’t stop, do not attempt to retrieve it yourself. Pull on to the hard shoulder near an emergency telephone and report the hazard. You will be connected to the police or a Highways Agency control centre.
B catch up with the lorry and try to get the driver’s attention
C stop close to the box until the police arrive
D pull over to the hard shoulder, then remove the box