Airport terminals often have small golf-cart-like trams that can be driven around in the passenger concourses. These are often used to help people move around the concourses (for example, one might be used to help a passenger with a leg in a cast who is trying to make it to a connecting flight).
These passenger carts can move quickly, and may run over pedestrians in the terminal. To help prevent this, the carts usually emit an incredibly loud and annoying beep (like a truck backing up).
However, it is usually not very obvious where a cart is based only on the annoying beeping sound, especially in a crowded concourse (Figure 1).
Instead of only beeping, the passenger cart could also have a special set of headlights that would project a “danger zone” image in front of them. This would make it extremely obvious as to where pedestrians should not walk.
These new headlights could be an after-market attachment, since most airports will probably not want to replace their existing fleet of golf carts.
The light would only turn on when the shuttle is moving and would only consume as much energy as ~10 handheld laser pointers, so it shouldn’t substantially reduce cart battery life.
PROS: Would make it much easier to avoid being run over by an airport carts.
CONS: Probably… none? Is this a legitimately good idea?