Complex sentence: Since its inception, the IRL race has utilized the full circuit, similar to the U.S. Grand Prix layout, including the "Boot" but also including the "Inner Loop" bus stop chicane that was build in 1992.
Split into simpler sentences: Since its inception, the IRL race has utilized the full circuit, similar to the U.S. Grand Prix layout. The layout includes the "Boot" and the "Inner Loop" bus stop chicane that was built in 1992.