There are a number of best practices for UX/UI design in autonomous electric vehicles that aim to create an intuitive and seamless experience for the user. Here are a few examples:

1. Simplicity and minimalism: The design should be as simple and minimalist as possible, with only the most essential information and controls displayed on the dashboard and touchscreen displays. This can help to reduce driver distraction and improve safety.
2. Proactive communication: The vehicle’s autonomous system should communicate its intentions clearly and proactively to the user. This can include things like displaying the vehicle’s intended path, as well as providing visual and audible alerts for potential hazards.
3. Control options: The vehicle should provide multiple ways for the user to control and override the autonomous system, including both physical buttons and touchscreens. This can provide an extra level of safety and comfort for the user.
4. Flexibility: The vehicle should be able to adapt its interface and controls to the preferences of the user, and to different driving scenarios. For example, the interface might be simplified when the car is in autonomous mode and more complex when the driver take over.
5. Safety: Design should be human centered and prioritize users’ safety, not only physical but also cognitive. Interfaces should be clear, easy to understand and not to overload drivers with unnecessary information.
6. Accessibility: The interface should be accessible to all users, including those with visual, auditory, and motor impairments. This can be achieved through things like large, high-contrast text, intuitive button layouts, and voice commands.
7. Consistency: The design should be consistent across the different interfaces in the vehicle, such as the dashboard, touchscreen displays, and mobile app. This can help to create a cohesive user experience.