Simplify the following text for a Grade 11 native English-speaking person.
Original: Brunswick became a popular place to settle in upon the completion of the local highway system in the Capital District , especially the upgrade of Route 7 into a four-lane highway in the 1980s .
Simplified: Brunswick became a popular place to settle in upon the completion of the local highway system in the Capital District , mostly the fix of Route 7 into a four-lane highway in the 1980s .