Background: Iran has one of the world\\\'s highest road traffic injury (RTI) rates, with 23 deaths per 100,000 in 2022 and a peak among 15-29-year-olds. Young males under 25 show high non-compliance. Family climate shapes safe driving; this study examined its influence on young adults\\\' behaviors and crashes. Objectives: We assessed: a) correlations between perceived parental road safety approaches and risky driving; b) variations by gender/age; c) predictions of crash involvement. Methods: 263 drivers (52% male; aged 18-30, Mean=22.29, SD=2.44) completed the 54-item Family Climate for Road Safety Scale (FCRSS; Taubman–Ben-Ari & Katz-Ben-Ami, 2013; 7-factors: Modeling, Feedback, Messages, Monitoring, Communication, Limits, Non-commitment) and 27-item Driver Behavior Questionnaire (DBQ), plus demographics (age, gender, exposure, crashes). Results: Higher FCRSS scores correlated with lower DBQ scores (risky behaviors), younger age, and fewer fines/crashes (all p<.05). Males, older youth, and higher exposure linked to elevated DBQ and crashes. Regressions showed Feedback (β=–.30, p=.01) and Non-commitment (β=.27, p<.05) predicted DBQ (R²=.313, F(10,227)=4.328, p<.001); Monitoring, age, and DBQ predicted crashes (χ²(11)=30.187, p=.001; Exp(B) for Monitoring=.902, p<.05). Conclusion: Reduced parental road safety climate predicts risky driving and crashes, independent of demographics/exposure. Interventions targeting Feedback, Monitoring, and Commitment could reduce youth RTI via family programs. Self-reports limit generalizability.

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