I tried to make this with minimal changes to the original layout, in which I think I succeded quite well.
The drag strip remains operational and can be used simultaniously with the short road course.
Start/Finish straight is running next to the drag strip.
A chicane has been added before the first corner in order to reduce speeds, as there isn't enough runoff. The second and third corners have also been modified to give more space for runoff.
A simple infield section has been added to allow for a better passing zone at the following chicane.
The chicane also slows the cars a bit for the pit straight. Not pictured, but there is also a possibility to use a chicane after the pit straight.
SPECTATOR AREAS
Infield is reserved for general admission, meaning no stands (with the exception of the drag strip stand already there). Temporary stands will be built along the pit straight and at the first chicane.