TORO ROSSO FLOOR
Reducing the amount of airflow that would normally be pulled into the low-pressure area of the underfloor and diffuser is critical to the overall performance of the underfloor.
The detail of the floor design just in front of the rear tyre is the area that has most effect on this airflow. Connecting this area to how the airflow gets squeezed around the outside of the tyre-to-track contact patch is what the teams are trying to do.
This vertical right-angle on the outer extremity of the floor will reduce the spillage off the top surface, meaning that the air displaced by the tyre will pull more of the airflow off the top surface through the floor slots to make it act like a seal. This detail gets more important when you run higher rear rideheights.