Formula E competitor Felix Rosenqvist will transition to IndyCar for 2019 as Scott Dixon's new teammate.
Three key venues on the 2019 IndyCar Series calendar will host three open tests during the year.
After taking turns winning the Freedom 100 and Indy Lights championship, Colton Herta and Pato O'Ward will compete with Harding Steinbrenner Racing in 2019.
Only A.J. Foyt owns more Indy car championships than Scott Dixon.
Ryan Hunter-Reay sped to the pole and race win during IndyCar's finale weekend in Northern California.
Takuma Sato will continue as Graham Rahal's teammate in 2019.
Session results, entrant facts, the weekend schedule, weather forecast and more for the 2018 INDYCAR Grand Prix of Sonoma.
Before 2018, Will Power had never started outside the top five at Sonoma Raceway.
Aiming to win the season finale despite not being in championship contention, Ryan Hunter-Reay put his DHL Honda on the pole at Sonoma.
Points leader Scott Dixon made himself the fastest driver in the final practice session until IndyCar opens a new season in March 2019.