Using some relatively inexpensive and readily available technology you can find at any well-stocked electronics store, Alaina Gassler, a 14-year-old inventor from West Grove, Pennsylvania, came up with a clever way to eliminate the blind spot created by the thick pillars on the side of a car’s windshield.
Gassler’s actually too young to have a driver’s license in most states and has never experienced the frustration of trying to see around those pillars while driving, but that didn’t stop her from tackling a problem that automakers have largely ignored. Her solution involves installing an outward-facing webcam on the outside of a vehicle’s windshield pillar, and then projecting a live feed from that camera onto the inside of that pillar. Custom 3D-printed parts allowed her to perfectly align the projected image so that it seamlessly blends with what a driver sees through the passenger window and the windshield, essentially making the pillar invisible.
Edit: Seen a reference to an earlier system designed by Jaguar Land Rover, though that wasn't using cheap off-the-shelf parts: https://www.autoblog.com/2014/12/15/jaguar-land-rover-360-virtual-urban-windscreen-transparent-pillar-follow-me-ghost-car-navigation-systems-video-official/#slide-1478075
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