Even the police fail to indicate when leaving the road I live on. It's a T junction, so are you going right or left? Don't forget to swing over to the right hand side to turn left while you're at it.Hardly anyone indicates.
If what you approach is a two way road, indicate which way you wish to turn.What angle do you have to approach another lane at to divide a left indication from a right indication?
If the slip road has been properly designed, you would be parallel to the carriageway and, I would argue, it is helpful to indicate your intention to change lanes - and, if you're fortunate, a helpful driver may let you in. Not all slip roads merge into lane 1. (I suppose you could argue that it isn't a slip road). This used to be the case at junction 24 of the M1 (it may still be, but I haven't travelled that way recently). Joining the M1 southbound at J24 the slip road used to become a new running lane (possibly marked off from the M1 proper by a solid lane marking). If you carry on in this lane, you end up on the A42 at J23a. If you want to join the M1 you need to indicate right and squeeze in between the lorries. Is another driver going south on the M1, and is not familiar with the junction layout, supposed to assume that you are going to pull out or not? A signal clarifies the intention.But you're not on the carriageway, you're joining it. .
I can think of at least one junction near here where you would confuse oncoming traffic as they would be expecting you to turn right across them rather than left in front of them.I signal right (on any junction/slip) when the angle of the car is such that the rear indicators are more visible to the traffic on the road I'm joining than the one I'm leaving; ie past about 45 degrees
Even if there is only say a 20% chance of the other party seeing it and acting then that's a worthwhile reduction in the chance of contact. It's got to be better than relying on them interpreting your 'body language'.Excellent point, but I'm not at all convinced that using the indicator will be much use in that situation.
There will always be exceptions, of course, but as I generally cancel my signal once I'm across both lanes (ie halfway into my destination lane) it would be a rather dim oncomer that thought I was going to cross him.I can think of at least one junction near here where you would confuse oncoming traffic as they would be expecting you to turn right across them rather than left in front of them.
Ah yes, but you missed the point. When turning right on a roundabout, you indicate right until you turn off. You would not do that in a one way system.By design. Unless you are evading the police and driving the wrong way, or are the police and following someone the wrong way, are not all roundabouts one way (clockwise).
We had one of those at the roundabout at the University of Sheffield in around 1972. It was a large roundabout with five exits. Experiments were carried out trying a large central island, five satellite islands round a small central one and a small central island. The last was decided to be most efficient.. I think the Swindon one is really just a circular road with a number of mini-roundabouts on it.