Act as drivers of vehicles? -- which vehicles?
The statement is unclear, and it causes a lot of confusion.
Why not clarify it?
One simple clarification: simply indicate what is meant by the word vehicles.
What is the intention here? -- what is the idea behind the communication?
And what is being denoted by the term?
Which vehicles are being referred to?
Certainly it does not mean all vehicles. That has already been established on other threads.
If one looks the word up in dictionaries (and other reference works), most of the meanings do not make sense.