I don't get it. Why would two tractors be side by side in a single lane road? You can barely fit one on a single lane.

I think one of us is confused about the exact setup we're talking here. But of course it is wholly irrelevant; some time ago a cab in NYC jumped the curb and crushed a tourists leg, yet I'm not here screaming for cabs to be banned from the roads or asking the cab driver association why they think they can drive on the sidewalk.