Candice Horbacz
Vehicle miles traveled (VMT) taxes have emerged as a prominent consideration for governments at all levels grappling with the pressing challenge of funding their deteriorating road infrastructure, yet widespread privacy fears have significantly impeded their implementation. Americans’ concerns about potential unconstitutional surveillance programs operating under the guise of a VMT tax are not unfounded, given the current technological landscape and existing data collection practices. However, a properly designed VMT tax system need not infringe upon drivers’ privacy rights, offering a path forward for sustainable transportation funding.
The existing mechanisms for funding road maintenance and construction are increasingly inadequate. Both the federal Highway Trust Fund and numerous state road programs are failing to generate sufficient revenue from traditional road user fees, primarily the gas tax. Policymakers are therefore compelled to explore more efficient and equitable alternatives. A VMT tax stands out as a more direct and effective user fee for roads compared to the antiquated gas tax and the myriad of other supplementary taxes and fees currently in place.
The Eroding Foundation: Why the Gas Tax is Failing
The federal fuel excise tax, often referred to as the gas tax, has been a cornerstone of American infrastructure funding for nearly a century. Established in 1932, it initially served as a direct link between road usage and funding. Drivers paid a per-gallon tax, with the revenue earmarked for highway construction and maintenance. This model worked effectively for decades, providing a relatively stable and predictable funding stream. The federal gas tax currently stands at 18.4 cents per gallon for gasoline and 24.4 cents per gallon for diesel, rates that have not been adjusted since 1993.
However, the efficacy of the gas tax has significantly diminished over time. Several factors contribute to its decline. Firstly, increased vehicle fuel efficiency means drivers travel more miles on less fuel, leading to lower tax contributions per mile driven. Modern vehicles, especially hybrids, achieve significantly better mileage than their predecessors, reducing the aggregate fuel consumption. Secondly, the rapid adoption of electric vehicles (EVs) poses an existential threat to the gas tax model. EVs consume no gasoline, meaning their drivers contribute nothing to road funding through this traditional mechanism, despite their substantial use of public roads. According to the International Energy Agency, global EV sales soared by 35% in 2023, with similar growth projected in key markets like the United States. As of early 2024, there are over 3 million EVs on U.S. roads, a number expected to grow exponentially in the coming decade.
The purchasing power of the gas tax has also eroded due to inflation. With no adjustment for over three decades, the fixed per-gallon rate buys significantly less in terms of construction materials, labor, and maintenance services today than it did in 1993. This has led to chronic shortfalls in the Highway Trust Fund, frequently requiring transfers from the general fund to remain solvent, undermining its original user-pays principle. State-level gas taxes, which vary widely (from roughly 8 cents per gallon in Alaska to over 60 cents in California), face similar pressures, contributing to a nationwide infrastructure funding crisis estimated to require trillions of dollars in investment over the next several years.
VMT Tax: A Modern Approach to Road Funding
A VMT tax directly addresses these shortcomings by charging drivers based on the actual miles they traverse on government-maintained roads. This principle establishes a clear and equitable user fee for the infrastructure they utilize. Crucially, the charge can be adjusted based on the vehicle’s weight, which directly correlates with the amount of wear and tear it imposes on road surfaces. This weight-based adjustment ensures a neutral and direct linkage between road usage, impact, and cost recovery.
Beyond its efficiency, a VMT tax offers several other compelling advantages. It simplifies the current convoluted system of road funding, potentially replacing a myriad of existing taxes and fees with a single, transparent charge. This consolidation would make the true cost of road usage much clearer to the public. Moreover, a VMT tax is inherently more neutral than the gas tax; it does not unfairly favor specific engine types, such as electric vehicles, nor does it disproportionately burden certain driving activities, unlike targeted levies like retail delivery fees or rental car taxes.
Transparency is another key benefit. The concept of paying a set price per mile is straightforward and easily understood, contrasting sharply with the opaque nature of current funding, where costs are spread across various taxes, sometimes even masking environmental program burdens within perceived road usage charges. Furthermore, a VMT tax is remarkably future-proof. It seamlessly accommodates the increasing prevalence of electric vehicles and any future advancements in propulsion technology, eliminating the need for constant legislative updates to ensure all road users contribute their fair share. This stability offers a reliable and predictable revenue stream, essential for long-term infrastructure planning.
The Shadow of Surveillance: Privacy as the Primary Obstacle
Despite the principled and economically sound arguments for a VMT tax, its path to implementation is fraught with significant opposition, primarily centered on concerns over drivers’ privacy. This apprehension is not merely speculative; it is deeply rooted in the public’s experience with expanding governmental and corporate surveillance.
A prominent voice in this debate is Governor Ron DeSantis (R-Florida), who recently articulated widespread public sentiment by posting on X (formerly Twitter) in November 2023/2024: "Vehicle Miles Driven (VMT) taxes require the government to surveil movements and violates individual privacy. This may be implemented in states like California, and some have argued that other states should follow. No dice." This statement encapsulates the core fear: that a VMT tax would inevitably transform into an unconstitutional government monitoring program.
The public’s wariness is entirely understandable given the proliferation of technologies that already track vehicle movements and driver behavior. One of the most significant contributors to this distrust is the widespread deployment of Automated License Plate Reader (ALPR) cameras. These cameras, mounted on police cars, toll gantries, and fixed locations, continuously scan and record every license plate that enters their field of view. The data—including vehicle location, date, and time—is then stored in vast, searchable databases, often shared between law enforcement agencies and private companies.
The open-source mapping project DeFlock has documented nearly 100,000 ALPR cameras across the United States. These systems have raised alarms among civil liberties advocates, with organizations like the Institute for Justice launching the "Plate Privacy Project" to legally challenge these warrantless mass surveillance programs. The U.S. Border Patrol, for instance, has been documented using ALPRs for AI-powered "predictive policing," raising serious questions about the scope and potential misuse of such data.
Even states whose officials express concern over VMT-related surveillance, such as Florida, widely utilize ALPR technology. Florida’s "Toll-By-Plate" system, which supplements its SunPass (EZ-pass) program for its extensive network of toll roads, heavily relies on ALPR cameras. DeFlock’s data indicates over 5,000 ALPR cameras in Florida, placing it among the states with the highest density of these devices per road mile. This existing infrastructure of vehicle tracking contributes to public skepticism about any new system that could potentially expand government access to granular movement data.
Further exacerbating privacy concerns is the 2021 Infrastructure Investment and Jobs Act (IIJA), which included a provision mandating the installation of a "kill switch" in new vehicles. This provision requires future vehicles to incorporate a surveillance system capable of "passively monitor[ing] the performance of a driver" and potentially preventing vehicle operation if impairment is detected. While the specifics of its implementation and timeline remain uncertain, this mandate adds to a growing list of ways vehicles can track their drivers, from built-in telematics to infotainment systems that collect vast amounts of personal data. Amid this landscape of increasing vehicle-centered privacy violations, public skepticism towards any new monitoring program, even one with a legitimate purpose, is perfectly reasonable.
Designing for Trust: Privacy-Conscious VMT Implementation
The critical distinction policymakers must emphasize is that a VMT tax does not inherently require government surveillance. Unlike ALPRs or "kill switch" mandates, a VMT system does not need to track drivers’ real-time locations, driving patterns, speed, or destinations. Its sole requirement is one piece of information: the total number of miles driven on government-maintained roads within a specific jurisdiction over a given period. This crucial data point can be collected in several privacy-preserving ways.
One of the most straightforward and least intrusive methods, demonstrated successfully in pilot programs, is periodic odometer reporting. The Washington state pilot program, for instance, showed that drivers could effectively report their odometer readings, often accompanied by a photograph for verification, to facilitate a VMT tax. To account for miles driven on private roads or outside the applicable jurisdiction, a standard exemption for non-chargeable miles can be provided. Drivers would also have the option to submit documentation for any non-taxable driving in excess of this standard exemption, ensuring fairness.
While governments should not mandate location-based tracking, they can certainly offer it as a voluntary option, especially if robust data anonymization and security protocols are in place. Many Americans already voluntarily opt into driving monitoring programs offered by their auto insurance companies. These systems, often using in-vehicle devices paired with smartphone apps, track not only miles driven but also behaviors like speed, acceleration, and braking patterns to offer usage-based insurance rates. A VMT system could leverage a similar model: drivers who prefer not to manually report odometer readings could choose to use an approved third-party commercial account manager (CAM). These CAMs would collect granular driving data, securely aggregate it, and then share only the necessary total mileage figure with the taxing authority, without revealing any location or behavioral data to the government. This approach ensures driver choice and maintains privacy.
California’s pilot programs have extensively tested various collection methods, including multiple CAMs, different location-tracking tools, and simple odometer readings. Their findings consistently suggest the viability of VMT systems, underscoring that effective implementation does not necessitate invasive surveillance.
Pilot Programs and Real-World Applications
The concept of a VMT tax is not theoretical; several states have actively explored and piloted such systems for years, providing valuable real-world data and insights into both administrative feasibility and public perception.
Oregon has been a pioneer in VMT research, launching its "OReGO" program in 2015, making it the first state to implement a voluntary road usage charge. OReGO offers participants various reporting methods, including simple odometer readings or GPS-enabled devices. The program demonstrated that drivers are willing to participate, especially when given choices and when the system is transparent about data usage.
Washington’s pilot program, which concluded in 2023, similarly evaluated multiple reporting options. Its final report highlighted the practicality of odometer readings, particularly when combined with photo verification or integration with vehicle telematics for automated, secure reporting. The program also underscored the importance of a clear communication strategy to address privacy fears and explain the purpose of the VMT charge.
California’s "Road Charge Collection Pilot" has been extensive, involving thousands of participants and testing a diverse array of technologies and reporting mechanisms. The California Department of Transportation’s interim reports have consistently affirmed the viability of VMT as a long-term funding solution, emphasizing the need for flexible reporting options to accommodate different driver preferences and privacy comfort levels. These pilot programs collectively demonstrate that the administrative challenges are surmountable and that privacy-preserving designs are not only possible but crucial for public acceptance.
Broader Implications and The Path Forward
The successful implementation of a VMT tax carries profound implications for the future of American infrastructure. Economically, it promises a more stable and equitable funding source for roads, ensuring that all users, regardless of their vehicle’s fuel type or efficiency, contribute proportionally to the maintenance costs. This direct user-fee approach could foster greater public accountability for infrastructure spending.
Environmentally, a VMT tax can complement climate goals without penalizing electric vehicle adoption. By delinking road funding from fossil fuel consumption, it removes a financial disincentive for EV owners to contribute to infrastructure, thus supporting the transition to cleaner transportation.
However, the political and societal implications remain significant. Overcoming deeply ingrained public distrust in government data collection will require more than just robust technical safeguards. It demands transparent communication, clear legislative mandates that strictly limit data collection to mileage totals, and severe penalties for any misuse of information. Policymakers must move beyond rhetorical grandstanding and commit to designing systems that genuinely prioritize driver privacy.
The future of transportation systems in the United States hinges on finding a sustainable, equitable, and publicly acceptable funding model. While the VMT tax offers a principled and efficient solution, its success will ultimately depend on the ability of governments to address and assuage legitimate privacy concerns through thoughtful design, rigorous data protection, and unwavering commitment to constitutional principles. Only then can sufficient, reliable, and principled funding be secured for the nation’s vital road infrastructure.
