The End Driving While Intoxicated Act of 2025 seeks to establish a national standard for preventing driving while intoxicated by requiring states to mandate ignition interlock devices for DWI offenders. This legislation mandates that states enact and enforce laws requiring a restriction on driving privileges, limiting offenders to operating only motor vehicles equipped with an ignition interlock device for a minimum period of 180 days. States retain flexibility in determining whether this interlock period can be served during an administrative license suspension, post-conviction, or a combination of both, and can define specific exceptions and violations. To incentivize compliance, the bill outlines a system of federal highway fund withholding for non-compliant states. Beginning in fiscal year 2027, states that do not meet these requirements will have 3 percent of their federal highway funds withheld, increasing to 5 percent in subsequent fiscal years. Withheld funds may be restored if a state achieves compliance within a specified timeframe, but funds not restored will lapse. The bill defines key terms such as "driving while intoxicated," "ignition interlock," "special exception," and "violation" to ensure consistent implementation across states.