I decided to try the Drag tracks in the airfield, test tracks under test drive option. As soon as you reach the end of the track it kicks you back into the menu screen, no timings, no completion just straight out into the menu.
I just thought I would mention it as it may be a bug?
In test drive, it’s broken. Not sure what the thinking was, but that’s all you get in test drive mode. On any “actual” drag track. What I do to tune or just get an idea of the car and mess around, is go to the air strip “open space”. There you can go to where the drag track start line is and run 1/4 and 1/2 on the runway. Stop quick for the 1/2, only 3/4 long. But if you line up, watch the timer and launch at the 10’s you can get a pretty good idea. Then to run an actual drag race, you have to go to multiplayer, start a private lobby then select drag race then track. They dropped the ball with drag racing. There are many threads expressing much frustration if you feel like checking them out.