No it doesn't! As the vehicle that blocked the line, he will be the first port of call, and then the incident (if any others were involved!). I quite deliberately said 'investigated' for that reason, there may be no others involved. It does not pre-suppose anything.
As already said
I hope the driver is being investigated by the Police....
That rather presupposes he's to blame. The
incident will be investigated. Then charges may be brought against
any party deemed at fault. Far too early to be pinning blame on the lorry driver.
Here's hoping he's okay.
The Police will do what is necessary to discover the cause and arrest, charge etc if required to do so