Car grass parking

Here are some thoughts about better supermarket green parking.
Principles - more trees, more grass, easy guide and faster drive.

1 Create the grass island which stays between wheels. It should work as better parking place guide than two lines between. Plus more green space and wider water drainage surface for trees. The surface under wheels and between cars  is ok to left paved - for better contact in winter and women heels.  
2 Plastic covered or green paved surface for front wheels  (it should be clear to driver that it's possible to drive in a bit) - like this

 3 Car parking distance flags - to ease for drivers to be more precise. They used for medium 4  and long 7 cars.
4 Cars stay for about 60 dergree. It is not as parking surface efficient as 90, but it is much easier to park = less movements, more precise parking, faster parking, better views
5 Small parking traffic light - just show if there are some parking lots available in the lane.  
6 one way direction  to avoid waiting time for opposite direction driving.