This study evaluated the effects of speech-based auditory warnings on safe driving behavior in high-risk situations using a high-fidelity driving simulator. Utilizing a within-subject design, 36 young drivers navigated an urban scenario under two conditions: "with" and "without" auditory warnings. Warnings consisted of brief Persian voice messages (e.g., reduce your speed, hazard ahead) delivered at predefined critical moments before hazardous events. Behavioral and vehicle-related indicators including collisions, speed limit exceedances, velocity, braking intensity, accelerator pedal input, engine RPM, and seatbelt used were recorded via simulator logs and analyzed using paired statistical tests. The auditory warnings significantly enhanced safety metrics: mean collisions with vehicles, pedestrians, and fixed objects decreased by 80%, 76%, and 56%, respectively, while speed limit exceedances dropped by 53%. During critical events, warnings prompted lower speeds, reduced accelerator input, lower engine RPM, and increased braking intensity. Seat-belt compliance also improved; however, as no explicit seat-belt warning was provided and the condition order was fixed, this remains an exploratory finding. Overall, this pilot study suggests that speech-based auditory warnings can significantly improve key indicators of safe driving behavior among young drivers in simulated environments. Nonetheless, generalizing these short-term findings to real-world driving requires future research with randomized condition tracking and larger sample sizes.