form for no reason Why do traffic jams sometimes form for no reason?, 11/24/14 Joseph Stromberg questo vecchio articolo di Vox هنا Vox Why do traffic jams sometimes form for no reason?, 11/24/14 Joseph Stromberg wrote for Vox Joseph Stromberg Physics of Phantom Traffic Jams Vox http://www.vox.com/2014/11/24/7276027/traffic-jam Joseph Stromberg/Vox