As Verizon Wireless expected, fans at the Indianapolis 500 race weekend used more than 20 terabytes of wireless data on the Verizon networks in and around the famed Brickyard track, more than doubling the data used in 2015. Though Verizon had predicted and prepared for the data onslaught, it’s still incredible to think that wireless data use at big events is still doubling every year. How much higher can it go?

For the actual day of this year’s Indy 500 race, Verizon said it saw more than 10 TB of data on its networks; last year on the race day Verizon saw 3.16 TB of data. For the full weekend, the exact total from Verizon was 20.8 TB; last year, the total for the entire weekend (Friday, Saturday and Sunday events) was more than 9 TB.

According to Verizon, the two highest data usage moments were the start of the race (at 12:19 p.m. local time), followed by another traffic spike at 1:15 p.m., when Juan Pablo Montoya’s car crashed. We haven’t seen an exact attendance number, but various sources said well over 350,000 fans attended this year’s race, the 100th in Indy 500 history.