Story here. Who’da thought?
"According to the latest physics research, rule-breakers – drivers passing you on the wrong side or changing lanes too close to the intersection – actually help smooth the flow of traffic for the rest of us."
So the next time someone cuts you off, give them some nice words of praise. 
But then, if jerks really did improve traffic flow, there’d probably be no traffic jams in Bangkok. Hmmm.