According to the TomTom Traffic Index, Austin is the 25th most traffic-congested city in the United States. Some of the most congested roadways include I-35 North and I-45 at I-69 and U.S. Highway 59. Austin roads can quickly back up during rush hours between 6- 9 am and 4-7 pm. Spring and fall are usually the busiest times to visit Austin, which may include more traffic. You’ll also find higher levels of traffic in certain Austin neighborhoods during major events like Austin City Limits and SXSW.