This means that the drivers generally cannot talk to each other.
"Most drivers talk about how much they made that day," he said.
For all I know, my driver was talking to his parents in Africa.
The pools of light revealed horses, and drivers talking in groups.
Suppose, he said, a driver is talking to his wife while in heavy traffic.
Three men got out of the back while the driver and the front seat passenger talked.
The driver was talking with some girl on the phone.
The expenditures are justified only if the agency can make the drivers talk.
The leading driver was talking about the best way to reach a main road.
Then when we were coming up to Northwest, the driver talked about the military and the roads.