If a driver suspects that their vehicle indicators have not been seen, what should the driver do?

Use a clear, decisive hand signal as well.
The driver’s position on the road is enough of a signal.
It is unnecessary to give signals provided observation is taken.

Explantion: If the driver is concerned that for whatever reason the indicators are not giving an adequate signal, they should use clear decisive hand signals as well to advise other road users of their intention.

Theory Tester

If a driver suspects that their vehicle indicators have not been seen, what should the driver do?

Managing Risk