The U.S. is undergoing revolutionary changes with the digital, electric, and self-driving nature of automobiles. Unlike the conventional systems that utilized mechanical control systems with physical linkages, the drive-by-wire technology utilizes electronic commands controlled by Electronic Control Units.
This not only unlocks new levels of design versatility, safety, and integration capabilities for ADAS, but also presents a high degree of harmonization between OEMs, technology readiness, and regulation that needs to be addressed jointly by all these players for a smooth integration of drive-by-wire technology in the vehicle architecture for the automobile sector, as can be observed in the U.S.
Regulatory Landscape: Safety Standards and Approvals
As one of the most essential factors concerning the U.S. drive-by-wire market, the question is all about how regulators approach safety and certification. Unlike some regions that follow United Nations Economic Commission for Europe regulations, the U.S. automotive safety framework falls under the National Highway Traffic Safety Administration and the Federal Motor Vehicle Safety Standards. Drive-by-wire innovations-especially those that replace critical mechanical linkages, such as steering and braking-must meet the stringent U.S. safety requirements before they can be deployed on public roads.
A notable recent milestone is the certification of a fully by-wire commercial vehicle, demonstrating regulatory acceptance of these systems in mainstream U.S. vehicle markets. In January 2024, REE Automotive's P7-C electric truck became the first fully steer-by-wire, brake-by-wire, and drive-by-wire vehicle to achieve FMVSS and EPA certification, clearing a key hurdle for broader commercial deployment in North America. This approval also makes the truck eligible for U.S. federal tax incentives for clean vehicles further encouraging its adoption.
While broader US regulatory initiatives about the safety of AVs are still in development, these certification successes indicate a willingness of regulators to approve novel electronic control architectures when presented with appropriate safety evidence.
(Source: REE)
Federal Policy and Autonomous Vehicle Support
While the direct regulatory frameworks on drive-by-wire, for instance, are still in the early stages of being developed in the U.S., the government remains highly supportive of autonomous and connected vehicle technology in general. This remains evident at the federal level, where the emphasis for transportation regulatory framework has been the continued leadership of the U.S. in this area of autonomous systems, advising on the need for innovation and safety.
(Source: United States Department of Transportation)
OEM Activity: From Concept to Certification and Production
U.S. automakers and technology players are actively engaging with drive-by-wire technologies. While early implementations focused primarily on throttle-by-wire — standard in many vehicles for years — more advanced steer-by-wire and brake-by-wire prototypes are beginning to move closer to commercialization, especially within electric vehicle (EV) platforms and specialty vehicles.
REE Automotive’s P7-C is one such example of the validation and launch of the U.S. in the commercial EV environment, which indicates that the drive-by-wire system is no longer limited in the research phase and is being progressed towards the end use.
In addition, the global OEM companies with U.S.-based operations, such as Tesla Motors, GM, and other global companies, are integrating the controls in their electric vehicles. Steer-by-wire systems are generally present in many electric vehicles and are used in the designs of other systems such as the electric steering assistance system, and U.S.-based operations are gaining benefits through research and development activities in the U.S. and other countries.
Challenges and Opportunity Ahead
In the case of U.S. drive-by-wire technology, there are several issues that need to be addressed. These are related to safety validation, cybersecurity, and devising efficient fault-tolerant systems. However, readiness level-wise, it can be ascertained that the U.S. is gradually shifting towards adoption.
Conclusion
The U.S. drive-by-wire market is moving from the experimental phase to the proven and ready-for-road implementation stage, with the help of increased regulatory developments, OEM investment, and maturation of the technology.” Although the need for “safety certification, cyber resilience, and fail operation” is essential to overcome, the “latest approvals from FMVSS and the EPA show that the regulatory body is ready to accept fully electronic control systems when sufficient evidence is provided regarding the safety aspects.”
With the expected rise in EVs and advancements in the capabilities of ADAS, the drive-by-wire system is poised to migrate from its niche market to the commercial and passenger vehicle segments. Moving ahead, the need for consistency between the government, automobile makers, and component suppliers will be paramount in increasing adaptation rates and making the drive-by-wire system an integral part of the new age of mobility in the USA.
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