For many drivers, crossing their arms while driving could be taken as a bad sign. In fact, crossing the arms can limit the driver's vision and make it more difficult to see the surroundings. Crossing your arms while driving can also cause your hands to obstruct your vision. When you take your driving test, always be aware of how you are driving. Crossing your arms while driving can be a sign that you are not concentrating, which can lead to difficulty on the test. If you are having difficulty with your driving test, be sure to speak with a driving instructor who can help you improve your driving.