Vehicle

1. non-motor

1.1. bicycle

1.1.1. wheel=2

1.1.2. applyBreaks()

2. Motor-Vehicle

2.1. engine

2.2. Car

2.2.1. model

2.2.2. speed

2.2.3. wheel=4

2.2.4. start()

2.2.5. applyBreaks()

2.2.6. changeGear()

2.3. Truck

2.3.1. model

2.3.2. speed

2.3.3. wheel=6

2.3.4. start()

2.3.5. applyBreaks()

2.3.6. changeGear()

2.4. scooter

2.4.1. model

2.4.2. speed

2.4.3. wheel=2

2.4.4. start()

2.4.5. applyBreaks()

2.4.6. changeGears()

3. wheel