1. **Eyes:** They appear to be focused on the road ahead, as evidenced by the direction of his gaze and the slightly furrowed brows. This suggests a level of concentration. The furrowed brows can also be associated with mild concern or determination. The view provided by the reflection in the rearview mirror doesn't show the eyes wide open in surprise nor narrowed in anger, reinforcing the impression of alertness or mild worry.

2. **Mouth:** It is in a neutral position, not indicating a smile or a frown. However, the lips are slightly pursed. Pursed lips can often indicate tension, thought, or uncertainty.

3. **Jaw and Cheek Muscles:** They appear slightly tensed. This tension can be indicative of stress or determination. 

4. **Overall Body Posture:** From the visible part of him, the posture appears upright and alert. There's no visible slouching or leaning, suggesting attentiveness.

**Conclusion:**

From the evidence provided by the image:

- The individual seems to be in a state of concentration and alertness, most likely due to driving.
- There's an underlying sense of tension or mild concern, potentially due to the driving conditions or personal thoughts.
- The facial expression appears genuine, as the context (driving) aligns with the emotion portrayed (concentration). There's no overt sign that the individual is trying to convey a different emotion to his social environment.