Creating a system where the road and the tires repel each other using magnets may sound like an interesting concept for achieving "flying cars," but there are several significant challenges and limitations that make this approach impractical:
Magnetic Field Strength: To generate enough repulsive force between the road and the tires to support a vehicle's weight, an extremely powerful magnetic field would be required. The magnetic fields needed to counteract gravity and lift a car would be far beyond the capabilities of current magnet technology. Such strong magnetic fields would be difficult to generate, control, and maintain over a large area like a road.
Energy Requirements: Generating and sustaining the necessary magnetic fields would consume an enormous amount of energy. This would likely result in an inefficient and energy-intensive system, making it impractical for everyday transportation.
Safety Concerns: Strong magnetic fields could pose significant safety risks, both to the vehicle occupants and other nearby objects or infrastructure. Strong magnetic fields could interfere with electronic devices, cause health hazards, or disrupt the functioning of essential systems.
Infrastructure Challenges: Implementing a magnetic repulsion system on a large scale would require extensive modifications to the existing road infrastructure. The cost and complexity of retrofitting roads with magnetic technology would be prohibitive.
Limited Applicability: A system based solely on magnetic repulsion would restrict the vehicles to designated magnetic roadways. This would limit the freedom and flexibility of movement that is desirable in a transportation system. Additionally, it would not address the challenges of takeoff, landing, or maneuvering in different environments, such as urban areas or uneven terrains.
While magnetic levitation (maglev) technologies exist for specific applications, such as high-speed trains, their implementation is highly specialized and not suitable for everyday road transportation. Currently, the most viable approaches for achieving "flying cars" involve alternative technologies, such as electric vertical takeoff and landing (eVTOL) aircraft or autonomous drones, which utilize rotors or propellers for lift and propulsion. These approaches are being explored and developed by various companies and researchers.