Yes, Austin has significant rush hour on all of it major streets, mainly Interstate 35, US183 , Loop 360 and Mopac(Loop 1). The only good thing right now is the rush hour doesn't last as long as other major cities. Typically rush hour gets very congested between 7:30am - 9am in the morning, and 4:30pm - 6:30pm in the afternoon. It's very difficult to maneuver around the traffic jams, because the way the city has been developed with residential homes. One can expect to be in rush hour typically between 30 to 50 minutes, hopefully without any accidents(then it's up in the air how long it may take). Austin never really planned the streets for the explosive growth that has taken place since the 90's.