You could repaint it a more visible colour or you could install daytime running Xenon lights which are ultra bright therefore ultra visible. You should remove all tint and darkened areas of the car and you could add chrome as this increases shine on the car at night but you should always check with the law first.
The head lights are called running lights and they make a car more visible to other drivers. This is really true if it is a light colored car and if people are using two lane roads at dusk.
To make sponsor logos more visible and for a very small aerodynamic advantage. Yes, because there may be dirt, etc. on the car that would produce drag.
no suv's do not make more noise than a car
methylene blue
To make themselves more visible to polinating insects and absorbe as much visible light as posible.
Not a real tornado of course. But if you take a glass of water and swirl it the soap bubbles will make the vortex more visible.
This depends on the shorts you choose to buy. Some shorts are brighter in color, and are going to be more visible in darker settings you might be running in.
Methylene blue
It will make your car use more gas than it should
No it will be there and visible before.
A car will make traveling and commuting more convenient and efficient.
there is no accesory for that