The Infrastructure Investment and Jobs Act and the Future of DUI Prevention Technology

For several years, headlines have circulated claiming that all new vehicles in the United States would soon contain technology capable of preventing impaired driving. Many articles suggested that beginning in 2026, every new vehicle sold in America would be required to include built-in “anti-drunk driving” technology.

That prediction oversimplified what Congress actually passed.

While the federal government has unquestionably moved toward encouraging advanced impaired-driving prevention systems, the reality is considerably more nuanced. The technology exists only in limited developmental forms, the federal rulemaking process remains incomplete, and the National Highway Traffic Safety Administration (NHTSA) has now openly acknowledged that the technology is not yet ready for widespread deployment in consumer vehicles.

The issue nevertheless represents one of the most significant developments in the history of DUI enforcement and automotive regulation.

The Infrastructure Investment and Jobs Act

In November 2021, Congress passed the Infrastructure Investment and Jobs Act (“IIJA”), also commonly referred to as the Bipartisan Infrastructure Law. Embedded within the massive transportation bill was a provision directing NHTSA to develop a federal motor vehicle safety standard addressing impaired driving technology.

Specifically, Section 24220 of the Act instructed NHTSA to issue a rule requiring “advanced drunk and impaired driving prevention technology” in new passenger vehicles if the agency determined that such a standard would be “practicable” and satisfy federal safety requirements.

The statutory language did not mandate immediate implementation. Instead, Congress ordered NHTSA to begin the formal rulemaking process.

Importantly, the law contemplated “passive” technology. Unlike ignition interlock systems currently used in DUI sentencing and probation contexts, Congress was not envisioning a system requiring drivers to blow into a tube before starting the vehicle.

Rather, lawmakers contemplated systems capable of monitoring driver impairment unobtrusively.

What Kind of Technology Is Being Considered?

The federal government and automotive researchers have focused on several categories of impairment-detection technology.

One approach involves breath-based systems embedded within the cabin of the vehicle. These systems attempt to detect alcohol concentration in ambient air near the driver’s position.

Another approach uses touch-based sensors capable of analyzing alcohol concentration through the skin when a driver touches the steering wheel or ignition interface.

A third category involves behavioral monitoring systems. These systems analyze steering behavior, lane position, braking patterns, eye movement, and driver attentiveness to identify signs consistent with impairment.

NHTSA’s January 2024 Advance Notice of Proposed Rulemaking (ANPRM) confirmed that the agency is considering systems capable of:

• Passively detecting blood alcohol concentration (“BAC”);
• Monitoring driver performance indicative of impairment; or
• Combining both approaches into a hybrid system.

The agency emphasized that the technology must function quickly, accurately, and with minimal inconvenience to sober drivers.

The DADSS Program

The most widely discussed project in this field is the Driver Alcohol Detection System for Safety (DADSS) program.

DADSS is a public-private partnership involving NHTSA, the Automotive Coalition for Traffic Safety, and major automotive manufacturers. The program has spent years researching passive alcohol-detection technology suitable for installation in ordinary consumer vehicles.

Two primary technologies have emerged from the project:

Breath-Based Detection

This system samples air exhaled by the driver and estimates BAC concentrations without requiring an active breath sample.

Touch-Based Detection

This technology uses infrared spectroscopy through the skin to estimate BAC levels from a driver’s fingertip or palm contact.

The goal is to allow a vehicle to determine whether a driver is impaired before the vehicle moves.

While the concept is technologically impressive, substantial engineering and legal hurdles remain.

The “2026” Misunderstanding

Much public confusion arose from headlines suggesting that all new cars would be required to contain DUI prevention technology beginning in 2026.

That was never entirely accurate.

The IIJA required NHTSA to issue a final rule by November 15, 2024. The law did not mandate nationwide installation by 2026.

In reality, NHTSA did not meet the 2024 deadline. Instead, the agency issued an ANPRM in January 2024 seeking public comment regarding the feasibility, accuracy, privacy implications, and technological limitations of impaired-driving prevention systems.

As of 2026, no final federal motor vehicle safety standard has been adopted.

NHTSA’s current regulatory agenda reflects that the agency remains in the “Analyzing Comments” stage of the rulemaking process.

This distinction matters significantly. Federal rulemaking often takes years. Even after a final rule is adopted, manufacturers are typically granted substantial lead time before compliance becomes mandatory.

Accordingly, widespread mandatory implementation is unlikely in the immediate future.

NHTSA’s 2026 Report to Congress

Perhaps the most important recent development occurred in 2026, when NHTSA submitted a formal Report to Congress regarding the status of impaired-driving prevention technology.

The agency acknowledged several critical limitations.

Most notably, NHTSA stated that no currently available production-ready systems can passively and accurately detect BAC at or above 0.08 in ordinary driving environments.

The report explained that environmental variables—including airflow, cabin size, passenger interference, weather conditions, and sensor contamination—continue to present major technical obstacles.

NHTSA also acknowledged that existing technologies are not yet ready for integration into mass-market consumer vehicles.

This represents a substantial departure from earlier media narratives suggesting that the technology was imminent.

Privacy and Constitutional Concerns

The proposal has also generated significant privacy concerns.

Critics question whether vehicles should continuously monitor driver behavior, biological markers, or cabin conditions. Some commentators have analogized the technology to perpetual roadside sobriety testing embedded into private automobiles.

Civil liberties advocates have raised concerns involving:

• Biometric data collection;
• Data retention;
• Government access to driving information;
• False positives;
• System reliability; and
• Potential misuse by insurers or law enforcement.

The constitutional implications remain largely unexplored because the technology has not yet been deployed broadly.

However, future litigation involving Fourth Amendment privacy rights, due process protections, evidentiary reliability, and manufacturer liability appears inevitable if such systems become mandatory.

Comparison to Ignition Interlock Devices

Current ignition interlock devices differ substantially from the systems contemplated by Congress.

Interlock devices are typically imposed after a DUI conviction or administrative revocation. Drivers must provide a breath sample before starting the vehicle and periodically while driving.

By contrast, the proposed federal systems are intended to operate passively and universally across the general driving population.

This distinction raises major public policy questions.

Ignition interlocks are punitive and individualized. Passive monitoring technology would effectively convert every new vehicle into an impairment-screening environment regardless of whether the driver has ever consumed alcohol or committed a traffic offense.

That shift represents a dramatic evolution in the relationship between drivers, vehicles, and government safety regulation.

Industry Challenges

Automakers also face practical concerns.

Manufacturers must balance:

• Cost;
• Consumer acceptance;
• Reliability;
• False positives;
• Warranty exposure; and
• Regulatory compliance.

A system that incorrectly prevents a sober driver from operating a vehicle could create substantial liability exposure.

Additionally, manufacturers must consider how these systems function in real-world environments involving:

• Mouthwash;
• Hand sanitizer;
• Passengers who consumed alcohol;
• Medical conditions;
• Heat and humidity fluctuations; and
• Sensor degradation over time.

The automotive industry has historically resisted mandatory technologies perceived as intrusive or insufficiently reliable.

Where Things Stand Today

As of 2026, the federal government remains committed to exploring impaired-driving prevention technology, but implementation remains uncertain.

Several realities are now clear:

• No final rule currently exists;
• The technology is still developmental;
• NHTSA has acknowledged significant limitations;
• Mandatory nationwide implementation is not imminent; and
• The legal and constitutional implications remain unresolved.

The federal government’s long-term trajectory nevertheless appears unmistakable. Congress and NHTSA continue to view passive impairment-detection systems as a potential future safety standard analogous to seat belts, airbags, and automatic emergency braking systems.

Whether the technology ultimately becomes practical, reliable, and politically acceptable remains to be seen.

What is clear, however, is that the “all cars will have DUI prevention technology by 2026” narrative significantly overstated the current reality.