This morning found me in the car waiting at a traffic island. Another car driven by a chap with a big beard approached from the right with his left-hand indicator going, suggesting he was about to turn down the road where I patiently waited. As far as I know the beard isn’t relevant.
Anyhow, instead of assuming beardy would actually turn left I waited, just in case. For some reason the subtle clues which tell us these things had come into play, suggesting to me that waiting was a good idea. The clues were right. He carried on across the island and if I’d pulled out we’d have hit each other.
Far from unusual, happens all the time, but a chap is bound to ask if indicators are really worthwhile. We can’t just believe them and carry on regardless so we don’t. If an approaching car is far enough away we go, if it isn't we are more cautious but we trust indicators at our peril.
We have moderate our faith in indicators with defensive driving and those subtle clues which generally keep us out of accidents. In which case why bother with indicators?