No matter what vehicle we might be in, once we enter the road network, we start a constant information exchange with our fellow road-users. Signals, brake lights and road position give important clues to those around us on what we're likely to do next. But it's the more subtle human-to-human interactions that are particularly important for cyclists and pedestrians – a wave of a hand, or direct eye contact with a driver, can offer a sense of road safety that technology simply can't.
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