Simplify the following text for a Grade 4 native English-speaking person.
Original: A modern infield road course was constructed between 1998 and 2000 , incorporating the western and southern portions of the oval ( including the southwest turn ) to create a 2.605 m track .
Simplified: A modern infield road course was constructed between 1998 and 2000 . It used part of the the oval and the infield to create a 2.605 m track .