Another short straight leads into the quick, left-handed Turn 12, with a short straight running parallel to the nearby Hulman Boulevard leading into the sharp, left-handed Turn 13.

Turn 14 is a sweeping left-hander in which riders will gain speed into the short straightaway leading into Turn 15, a 90-degree right-hander. Riders then will flick their motorcycles to the left almost immediately, skimming their left knees just above the asphalt, for the 90-degree, left-handed Turn 16 that exits onto the famed front straightaway.

MotoGP riders will then accelerate to full power and cross the 'Yard of Bricks' at approximately 200mph to complete a lap.

Meanwhile, other changes to the circuit will enhance safety for all events, oval and road course.

The guardrail inside Turns 1 and 2 of the oval is being removed, which will create more run-off area for motorcycle racers on the road circuit and car racers on the oval. The ditch carrying the creek inside of Turn 1 of the oval is being filled and re-routed further into the infield of the track to accommodate the new four-turn complex and eliminate a possible safety hazard.

"It's going to improve safety, creating all of that new run-off area for oval race vehicles," Forbes said. "I think it's a great thing that we're not only making this for use as a motorcycle circuit, but we're improving the safety and the aesthetics of the oval."

Other facets of the construction project involve some excavation in the infield and relocation of spectator mounds adjacent to the infield portion of the new road circuit. The number of spectator mounds will remain unchanged.

Unlike at Laguna Seca, all three grand prix classes will be competing at Indianapolis - MotoGP, 250cc and 125cc.