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Front Brake Lights Could Drastically Diminish Road Accident Rates
(bioengineer.org)
This is a most excellent place for technology news and articles.
Turn signal or not, you shouldn't be pulling out in front of them. You should be assuming they are turning into a driveway after the intersection, or that they mistook your intersection for the next one down the road, or that they left their turn signal on from a lane change 5 miles back.
Turn signals are lies until conclusively proven otherwise.