The restart zone is a marked area on the track. The leader controls acceleration within this zone. Drivers cannot pass before the designated line. Officials monitor restarts closely for rule compliance. The zone ensures consistent and fair restarts. Drivers time throttle input carefully inside boundaries. Accelerating too early can cause penalties. For example a leader accelerated inside the restart zone. That move secured track position into the first turn. Spotters communicate timing during the restart process. Strong restarts often gain immediate advantages. Controlled launches reduce collision risk.