A simple contagion process describes spreading of traffic jams in urban networks. - Meead Saberi; Mudabber Ashfaq; Homayoun Hamedmoghadam; Seyed Amir Hosseini; Ziyuan Gu; Sajjad Shafiei; Divya Jayakumar Nair; Vinayak V. Dixit; Lauren Gardner; S. Travis Waller; Marta C. González (CoRR, 2019)