To convert kilometers to miles, you can use the conversion factor that 1 kilometer is approximately equal to 0.621371 miles.
To convert 30 kilometers to miles:
\[ 30 \text{ km} \times 0.621371 \text{ miles/km} \approx 18.64 \text{ miles} \]
So, a driver traveling 30 kilometers would travel approximately 18.64 miles.