In this example, exit number four is at 12 o’clock, so 12 o’clock or before is left hand lane.
So we follow the left lane. We don’t signal until we’re halfway past exit number 3. Then we check our centre mirror, left mirror, signal left and come off for exit number 4.
Now, although this is straight ahead, you still need to signal left to come off. We’ve all been the pedestrian waiting in the middle of the road to cross and the cars are coming round with no signal on and we just don’t know whether they’re coming off at our exit or going all the way round the roundabout.
So to signal off helps not only helps any pedestrians that could be waiting to cross the road, but will also help the oncoming traffic to know that you’re coming off at that exit, so they can keep going.