Professor Mark Stevenson, of the Injury Research Centre at the University of Western Australia, explains that holding a conversation on the telephone is considerably more difficult than just having a conversation in the car with someone.
Profesor Mark Stevenson dari Pusat Riset Cedera di University of Western Australia, menjelaskan bahwa bercakap - cakap lewat telepon jauh lebih sulit daripada sekadar bercakap - cakap dengan seseorang yang semobil.