Complex sentence: In 1990, two chicanes were added onto the Mulsanne Straight (explained in more detail below), and in 1994, the Dunlop chicane was tightened, in 2002, the run to the Esses was revamped because of a reconstruction of the Bugatti Circuit.
Split into simpler sentences: In 1990, two chicanes were added onto the Mulsanne Straight (explained in more detail below), and in 1994, the Dunlop chicane was tightened. In 2002, the run to the Esses was reconfigured in the wake of renovations to the Bugatti Circuit.