Complex sentence: In August 2012, David Coulthard drove portions of the course and through the Lincoln Tunnel (in which he reached a speed of 190 mph) to test out the roadways and garner support for the Grand Prix of America.
Split into simpler sentences: In August 2012, David Coulthard drove portions of the course to test out the roadways. He also did demonstrations at Liberty State Park drove and through the Lincoln Tunnel (in which he reached a speed of 190 mph) to test and garner support for the Grand Prix of America.