Neither Champ Car nor the IRL permits the other's cars to participate in its series. George said he made the two-year stipulation because the IRL will introduce new cars for the 2010 season.

Open-wheel racing continues to make progress toward a unification of its two top U.S. divisions, but a settlement is not yet in place, officials said ...

Officials from the Indy Racing League and Champ Car World Series struck a preliminary agreement Tuesday to fold elements of the Champ Car World Series into the IRL IndyCar Series, according to a ...