MO HB3415

Amends the "Siddens Bening Hands Free Law" to allow counties, municipalities, and other political subdivisions to enact local laws regulating electronic communication device use while driving, provided such local regulations are consistent with state law

Prohibits drivers from physically holding electronic devices, texting, making calls without hands-free features, watching videos, or recording/broadcasting while operating a vehicle on Missouri highways

Establishes escalating fines: up to $150 for first offense, $250 for second offense within 24 months, and $500 for third or subsequent offenses or violations in work/school zones

Creates criminal penalties when violations cause harm: class D misdemeanor for property damage over $5,000, class B misdemeanor for serious physical injury, and class D felony for causing death

Exempts law enforcement, emergency situations, hands-free device use, navigation, audio playback, and vehicles that are lawfully stopped or parked; prior to January 1, 2025, only warnings could be issued for noncommercial vehicle violations