1. A screen for keeping the sunlight out when parked, that automatically extends itself across windows as needed at the push of a button - and adjusts itself with changes in the Sun's position.
2. Kind of evil, but could prove useful: Two pairs of electronic screens, one on the front and one on the back of the car, placed and configured so as to be clearly visible to other motorists in all light conditions; the left one displaying the number of accidents the driver has had within the last decade, the right one showing the number of tickets he has gotten during that same period of time. Made mandatory, of course. Could be set up to identify the driver by fingerprint on the steering wheel, or some other method, like a bar code/magnetic code on the driver's license, its swiping being required to start the car. Subject to routine checking during police stops, just like driver's licenses are today. Could retrieve data by radio from central authority once a month.
2. Kind of evil, but could prove useful: Two pairs of electronic screens, one on the front and one on the back of the car, placed and configured so as to be clearly visible to other motorists in all light conditions; the left one displaying the number of accidents the driver has had within the last decade, the right one showing the number of tickets he has gotten during that same period of time. Made mandatory, of course. Could be set up to identify the driver by fingerprint on the steering wheel, or some other method, like a bar code/magnetic code on the driver's license, its swiping being required to start the car. Subject to routine checking during police stops, just like driver's licenses are today. Could retrieve data by radio from central authority once a month.
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