Welcome to the Community @arm_phanlob. I know that some trackers can register information while you are driving. To avoid this, I can provide you two options:
- You can download "DriveBit", an app that will register the information while driving and log this activity to your Fitbit account.
- You can manually log the activity "Drive" to negate the extra information by doing the following from your Android Fitbit app:
- Tap the exercise tile.
- Tap the timer in the top right corner; this will take you to the Mobile Run screen.
- Tap "Log" at the top of the screen.
- Log your activity.
I hope this helps, let me know the outcome. 
Alejandra | Community Moderator, FitbitIf you like something I recommended, I encourage you to mark that reply as "Best Answer". 🙂