It's hard to tell if this SC had a third brake light installed but apparently it may have made a difference:
Quote:
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In 1974, psychologist John Voevodsky tested a small, inexpensive gadget that would eventually make U.S. highways much safer. The gadget was a third brake light, mounted in the base of rear windshields so that when drivers pressed their brakes, a triangle of light warned following drivers to slow down. To test whether such a small addition would make a significant difference, Voevodsky equipped 343 San Francisco taxicabs with the third brake light and left 160 taxis with no additional light as a control group. Taxi dispatchers then randomly assigned taxi drivers to taxis with or without the third light, regardless of drivers' expressed preferences. At the end of a 10-month experiment, taxis with a third brake light had suffered 60.6% fewer rear-end collisions than had the control-group taxis. Additionally, drivers of taxis with the third brake light that were struck in the rear by other vehicles were injured 61.1% less often than were drivers of taxis without the light, and repairs to all taxis with the light cost 61.8% less than did repairs to taxis without the light.
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While following my own Carrera driven by a friend I noticed that the tail and brake lights seemed a little dim, I'll be checking into that soon.