Background:
When traveling in a vehicle, a person’s intuitive sense of speed is partly determined by the feeling of air movement.
For example, going at 30 miles per hour on a bike (enclosed cabin: no) may feel faster than going 600 miles per hour in an airplane (enclosed cabin: yes).
The issue:
It’s important for automobile drivers to intuitively understand their speed, especially when driving on slick or windy roads.
But with a properly sound-insulated passenger cabin, it’s easy to ignore the fact that you’re going 70 miles per hour on a highway.
Proposal:
In order to help drivers intuitively understand their current speed, a fan should be added to the dashboard in order to blow air on the driver’s face.
This fan would be synchronized with the speedometer: more speed equals more airflow, thus resulting in intuitive “feeling” of car speed (Figure 1).
This system is basically a just a more complicated version of sticking your head out the car window.
Fan Implementation Option #2:
The car’s existing climate control system could be used, instead of requiring an additional fan. The only downside here is that the car’s normal fans are probably not sufficient to fully convey the speed of highway driving. But on the plus side, this could be implemented entirely in software!
Fan Implementation Option #3:
The fan could be replaced by a simple duct leading from the outside of the car, which would direct outside air directly into the driver’s face. This has a few downsides, such as the possibility of venting ice-cold air or swarms of insects directly into the driver’s face, which may negatively impact driving safety.
Conclusion:
“Implementation option #2” could probably be an actual product. Not sure if it would run afoul of any automotive safety regulations, though!
PROS: May cause people to once again buy driving goggles, thus revitalizing a neglected manufacturing industry.
CONS: None! Only upsides found here.
WorstPlans: updated every Monday since July 2014! 
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