Requires alternating high and low, two-toned signal devices on emergency services vehicles

This bill requires all non-police, non-fire, and non-medical emergency vehicles in New York City to use alternating high-and-low, two-toned sound signals (instead of single-tone sirens) and limits maximum sound levels to 90 decibels at 50 feet. It mandates annual testing and certification of these devices to ensure compliance, with possible two-year extensions for owners facing undue hardship. The law applies to most emergency vehicles but excludes police, fire department, and medical emergency response vehicles. The rule takes effect 180 days after enactment, with immediate rulemaking authority for implementation.