Types of Circuits and Tracks for Indycar

The American National Championship is noteworthy for the wide variety of racetracks it has used compared to other series, such as Formula One and the various forms of staying power sports car racing. The mainstays of the championship are smooth oval speedway tracks, road courses and closed public road/street circuits.

Until 1970 the championship often raced on dirt and clay tracks, but all such tracks were isolated permanently by the USAC before the 1971 season.

From 1915 to 1931 wooden speedways were repeatedly used for championship races; however they were too high-priced to maintain, especially with the onset of the Great Depression, and nearly all were demolished in the 1930s.

The Pikes Peak Hillclimb was a in a circle of the championship in the years 1947 to 1955 and 1965 to 1969.

In 1909 a point-to-point race from Los Angeles, California to Phoenix, Arizona was incorporated in the championship.

For financial year 2007 the Indycar series has added three new tracks for the series and are as shown below.
Iowa:

7/8 Mile track

New construction.

12, 13, 14 degree banking in turn
10 degree on front straight

4 degree on back straight

60 feet wide

20 foot apron

Latest generation of safe barrier

Richmond race levels of down force would emerge too high. Track surface very new with high levels of grip. Some thoughtfulness must be given to a reduced level of down force at the Open Test. On the other hand, lap speed could become high.
Detroit

Road Course

2.4 Mile asphalt track

Significant elevation changes

Similar requirements regarding paddock, parking etc
Mid Ohio

Street circuit- No opportunity to test prior to event as track consists of public road

Logical challenge to install barriers along the

Detailed simulations for barrier construction