Likewise and with BBF to get focus and shutter release separateWhen I used to shoot motorsport with a Canon DSLR I generally used the 3 x 3 grid and AI Servo AF (Continuous AF).
You can use any of them, they all have their advantages and disadvantages. My own preference would be No 4.So sorry, I said Canon 5D MK 3 ........ but I mean MK IV.
I have added a different AF Mode photo, please can you let me know which one (number 1 to 7) I should use for moving cars/trains, thank you.