Yes, a smart car is legally allowed and mechanically capable of driving on the motorway. Vehicles like the Smart Fortwo meet all federal safety standards required for highway use. However, the experience is significantly different from driving a conventional car due to the Smart's small size, light weight, and relatively low horsepower.
The primary challenge is stability in crosswinds and when passing large trucks. The car's short wheelbase and light curb weight can make it feel buffeted by strong gusts. You'll need to keep a firm grip on the steering wheel. For safety, it's best to stay in the right-hand lane and maintain a consistent speed. While the latest models can reach and sustain motorway speeds (e.g., 70-80 mph), overtaking requires careful planning as the acceleration is modest. The small engine will be working hard, so expect higher cabin noise and lower fuel efficiency at these sustained high speeds compared to city driving.
From a technical standpoint, the car is designed for it. Features like Electronic Stability Program (ESP) are standard, which helps maintain control. The torsion beam rear axle in the chassis tuning also contributes to stability. The key is driver adaptation: understanding the car's limitations and driving defensively.
Here is a comparison of key specifications for a typical Smart Fortwo against a common highway sedan:
| Specification | Smart Fortwo (Example) | Typical Compact Sedan (Example) |
|---|
| Horsepower | 89 hp | 158 hp |
| 0-100 km/h (0-62 mph) | ~10.5 seconds | ~8.0 seconds |
| Curb Weight | ~1,800 lbs (820 kg) | ~3,000 lbs (1,360 kg) |
| Wheelbase | 74.4 inches (1.89 m) | 106.3 inches (2.70 m) |
| Fuel Economy (Highway) | ~38 mpg | ~42 mpg |
| Overall Length | 106.1 inches (2.69 m) | 182.3 inches (4.63 m) |
In summary, you can absolutely take a smart car on the motorway for a journey. It's a viable, though not necessarily relaxing, option for a confident driver who is aware of its unique driving dynamics.
