The **hill start assist system** is a technology designed to facilitate vehicle start-up on steep slopes. This system is especially useful when the driver needs to switch their foot from the brake to the accelerator without the vehicle rolling backward.

- **System operation**: It uses a **sensor** that detects the vehicle's **inclination angle**. When the driver lifts their foot off the brake, the system prevents the vehicle from rolling backward, providing additional time for the driver to press the accelerator and continue driving safely.

- This system is different from other methods, such as using the parking brake or rapid engine acceleration, as it focuses on keeping the vehicle in place by detecting the slope angle, without requiring additional driver intervention.