2006 Grand Prix of Road America
The 2006 Grand Prix of Road America was the twelfth round of the 2006 Bridgestone Presents the Champ Car World Series Powered by Ford season, held on September 24, 2006 at Road America in Elkhart Lake, Wisconsin. Dan Clarke took the pole, the first and only of his Champ Car career. A. J. Allmendinger won the race, his fifth and last win of the year and his Champ Car career. The event is most remembered for a horrific crash involving Katherine Legge that resulted a 42-minute red flag. The rear wing on her car failed just before the high speed Turn 11 Kink, the unexpected loss of downforce caused her to crash violently into the catch fence, demolishing the car. Legge was uninjured in the incident.Qualifying results
| Pos | Nat | Name | Team | Qual 1 | Qual 2 | Best |
| 1 |  | Dan Clarke | CTE Racing-HVM | 1:55.123 | — | 1:55.123 |
| 2 |  | Sébastien Bourdais | Newman/Haas Racing | 1:58.945 | 2:06.460 | 1:58.945 |
| 3 |  | Charles Zwolsman | Mi-Jack Conquest Racing | 1:55.599 | 2:11.121 | 1:55.599 |
| 4 |  | Alex Tagliani | Team Australia | 1:57.517 | 2:09.891 | 1:57.517 |
| 5 |  | A. J. Allmendinger | Forsythe Racing | 1:58.507 | 2:07.969 | 1:58.507 |
| 6 | | Justin Wilson | RuSPORT | 1:59.076 | 2:06.994 | 1:59.076 |
| 7 |  | Will Power | Team Australia | 1:59.286 | 2:07.683 | 1:59.286 |
| 8 | | Katherine Legge | PKV Racing | 1:59.388 | 2:12.916 | 1:59.388 |
| 9 | | Andrew Ranger | Mi-Jack Conquest Racing | 1:59.486 | 4:09.032 | 1:59.486 |
| 10 |  | Bruno Junqueira | Newman/Haas Racing | 1:59.977 | — | 1:59.977 |
| 11 | | Paul Tracy | Forsythe Racing | 2:00.165 | 2:08.767 | 2:00.165 |
| 12 |  | Jan Heylen | Dale Coyne Racing | 2:00.835 | 2:11.400 | 2:00.835 |
| 13 |  | Oriol Servià | PKV Racing | 2:01.082 | 2:10.782 | 2:01.082 |
| 14 |  | Tõnis Kasemets | Rocketsports Racing | 2:01.381 | 2:10.273 | 2:01.381 |
| 15 |  | Mario Domínguez | Rocketsports Racing | 2:01.882 | 2:11.076 | 2:01.882 |
| 16 | | Nelson Philippe | CTE Racing-HVM | 2:02.273 | 2:10.028 | 2:02.273 |
| 17 |  | Juan Cáceres | Dale Coyne Racing | 2:03.690 | 2:13.169 | 2:03.690 |
Race
| Pos | No | Driver | Team | Laps | Time/Retired | Grid | Points |
| 1 | 7 | A. J. Allmendinger | Forsythe Racing | 51 | 1:54:43.700 | 5 | 32 |
| 2 | 2 | Bruno Junqueira | Newman/Haas Racing | 51 | +0.675 secs | 10 | 28 |
| 3 | 1 | Sébastien Bourdais | Newman/Haas Racing | 51 | +0.988 secs | 2 | 28 |
| 4 | 6 | Oriol Servià | PKV Racing | 51 | +2.637 secs | 13 | 24 |
| 5 | 9 | Justin Wilson | RuSPORT | 51 | +3.763 secs | 6 | 21 |
| 6 | 14 | Dan Clarke | CTE Racing-HVM | 51 | +4.746 secs | 1 | 21 |
| 7 | 34 | Charles Zwolsman | Mi-Jack Conquest Racing | 51 | +5.537 secs | 3 | 18 |
| 8 | 27 | Andrew Ranger | Mi-Jack Conquest Racing | 51 | +7.359 secs | 9 | 15 |
| 9 | 11 | Jan Heylen | Dale Coyne Racing | 51 | +8.668 secs | 12 | 13 |
| 10 | 3 | Paul Tracy | Forsythe Racing | 51 | +9.018 secs | 11 | 11 |
| 11 | 15 | Alex Tagliani | Team Australia | 51 | +13.172 secs | 4 | 10 |
| 12 | 8 | Mario Domínguez | Rocketsports Racing | 51 | +20.151 secs | 15 | 9 |
| 13 | 5 | Will Power | Team Australia | 50 | + 1 Lap | 7 | 8 |
| 14 | 4 | Nelson Philippe | CTE Racing-HVM | 50 | + 1 Lap | 16 | 7 |
| 15 | 19 |  Juan Cáceres | Dale Coyne Racing | 50 | + 1 Lap | 17 | 6 |
| 16 | 20 | Katherine Legge | PKV Racing | 45 | Accident | 8 | 5 |
| 17 | 18 | Tõnis Kasemets | Rocketsports Racing | 14 | Gearbox | 14 | 4 |
Caution flags
;Drivers' Championship standings
| Pos | Driver | Points |
| 1 | Sébastien Bourdais | 338 |
| 1 | 2 | A. J. Allmendinger | 280 |
| 1 | 3 | Justin Wilson | 269 |
| 1 | 4 | Paul Tracy | 184 |
| 1 | 5 | Nelson Philippe | 182 |
- Note: Only the top five positions are included.
