Smart cars have several unique features.

First, they are often equipped with advanced driver assistance systems, such as adaptive cruise control, lane-keeping assist, and automatic emergency braking. These systems make driving safer and more convenient.

Second, smart cars usually have efficient and eco-friendly powertrains, like electric or hybrid engines, which contribute to reducing emissions and saving fuel.

Third, their interior designs are modern and tech-savvy, featuring large touchscreen displays for infotainment and vehicle control.

Fourth, smart cars are often connected to the internet, allowing for real-time navigation, remote vehicle monitoring, and software updates over the air.

Fifth, they may have unique exterior designs that are both aerodynamic and aesthetically pleasing.

Sixth, some smart cars offer self-parking capabilities, which is a huge convenience in crowded urban areas.

Seventh, the materials used in their construction are lightweight yet strong, enhancing performance and fuel efficiency.

In conclusion, the unique features of smart cars combine safety, technology, efficiency, and style to provide a superior driving experience.