How do the 10 full-time IndyCar teams stack up against one another with all 11 road or street course races on the 2018 schedule in the books?
The 17-race 2018 IndyCar season reached its conclusion upon the conclusion of its 11th and final road or street course race, the IndyCar Grand Prix of Sonoma, at Sonoma Raceway. Andretti Autosport’s Ryan Hunter-Reay dominated this race.
Hunter-Reay’s victory in the 85-lap race around the 12-turn, 2.385-mile (3.838-kilometer) Sonoma Raceway road course in Sonoma, Raceway was Andretti Autosport’s fourth road or street course race victory of the season.
Hunter-Reay also won the second race on the streets of Belle Isle in Detroit, Michigan while teammate Alexander Rossi won the race on the streets of Long Beach, California as well as the race at Mid-Ohio Sports Car Course.
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Andretti Autosport ended the season as the only team with at least one victory in a road course race and at least one victory in a street course race, and they had two road course races victories and two street course race victories.
Heading into the season finale, Andretti Autosport and Team Penske were tied with three victories in road or street course races. With Hunter-Reay’s victory, the former ended up on top of the 2018 road and street course race wins list. They had not previously secured four road or street course race victories in a single season since the 1999 CART season when Paul Tracy and Dario Franchitti combined to earn four road or street course race victories for the team.
How did Andretti Autosport’s fourth road or street course race victory and the rest of the action from the 2018 season finale affect the IndyCar Team Road and Street Course Power Rankings? Here are the formulated IndyCar Team Road and Street Course Power Rankings and the non-formulated IndyCar Team Road and Street Course Power Rankings following the IndyCar Grand Prix of Sonoma.
To see how the formulated IndyCar Team Road and Street Course Power Rankings are calculated, click here.
Formulated IndyCar Team Road and Street Course Power Rankings
| Rank | Team | Manufacturer | Last Rank | Trend |
| 1 | Chip Ganassi Racing | Honda | 1 | 0 |
| 2 | Andretti Autosport | Honda | 3 | +1 |
| 3 | Team Penske | Chevrolet | 4 | +1 |
| 4 | Schmidt Peterson Motorsports | Honda | 2 | -2 |
| 5 | Dale Coyne Racing | Honda | 5 | 0 |
| 6 | Rahal Letterman Lanigan Racing | Honda | 6 | 0 |
| 7 | A.J. Foyt Enterprises | Chevrolet | 7 | 0 |
| 8 | Ed Carpenter Racing | Chevrolet | 8 | 0 |
| 9 | Carlin Motorsport | Chevrolet | 9 | 0 |
| 10 | Harding Racing | Chevrolet | 10 | 0 |
Biggest Movers
Up: Andretti Autosport, Team Penske (+1)
Down: Schmidt Peterson Motorsports (-2)
Non-formulated IndyCar Team Road and Street Course Power Rankings
| Rank | Team | Manufacturer | Last Rank | Trend |
| 1 | Andretti Autosport | Honda | 1 | 0 |
| 2 | Chip Ganassi Racing | Honda | 2 | 0 |
| 3 | Team Penske | Chevrolet | 3 | 0 |
| 4 | Schmidt Peterson Motorsports | Honda | 4 | 0 |
| 5 | Dale Coyne Racing | Honda | 5 | 0 |
| 6 | Rahal Letterman Lanigan Racing | Honda | 6 | 0 |
| 7 | A.J. Foyt Enterprises | Chevrolet | 8 | +1 |
| 8 | Ed Carpenter Racing | Chevrolet | 7 | -1 |
| 9 | Carlin Motorsport | Chevrolet | 9 | 0 |
| 10 | Harding Racing | Chevrolet | 10 | 0 |
Biggest Movers
Up: A.J. Foyt Enterprises (+1)
Down: Ed Carpenter Racing (-1)
Formulated rankings predictions for after next race
The IndyCar Grand Prix of Sonoma was the 2018 IndyCar season finale. As a result, there are no formulated rankings predictions for the formulated IndyCar Team Power Rankings after the next race in this edition of the power rankings.
The Firestone Grand Prix of St. Petersburg on the streets of St. Petersburg is the 2019 IndyCar season opener. This race is scheduled to take place on Sunday, March 10, 2019, so be sure not to miss it. That said, also be sure to enjoy the next few months before next season gets underway.