This trial run has been authorised as to gather information about the current course layout as the Indianapolis Motor Speedway considers changes and upgrades to the track.
Speedway officials plan to invest nearly $100 million in the facility that could include modifications to the road course to allow IndyCar testing or racing in the future.
IndyCar Series President of Competition Derrick Walker said he expects to have Rahal test several configurations of the road course.
Auto123.com had already reported that the IMS, along with the IndyCar brass, are evaluating the feasibility of holding an IndyCar event on the IMS road course at the beginning of May to launch the Indianapolis 500 activities.
Although the idea could generate some interest in the racing world, some prominent drivers like Helio castroneves and Dario Franchitti have already stated their skepticism toward such an event.
The IMS road course has hosted several racing series including Formula One race from 2000-2007, the annual MotoGP event that debuted in 2008, and the Grand-Am Rolex Series that first competed at IMS in 2012.