toontra said:Almost always, in case there is a vehicle wanting to pull out on the left (if it's a T junction) or the right (if it's a cross roads) or if there are pedestrians about to cross the left turning.
It's just generally a good idea to let anyone around know what you are doing IMO.
It always irritates me, for example, when I'm waiting to pull out onto a main road from a side road and I wait for an oncoming car from the right which eventually turns left without having indicated.
BentMikey said:Here's a question for you. Do you signal left when turning left? I'm interested in not only what you do, but in what situations and why.
Membrane said:I indicate when there is traffic that might benefit from it. That traffic can be behind me (possibly also wanting to turn left), coming towards me (if they want to turn right), on a right side road (if they want to continue straight ahead), or on the left side road.
andrew_s said:Beware of indicating for traffic that will arrive at the junction at about the same time as you.
Eg If a car following also wants to turn left, and you indicate left, some motorists will take your indication as an invitation to overtake on the corner which will very likely squeeze you into the kerb.
If there's any chance of that sort of thing, I take a leaf out of the motorist's book and indicate at the last moment when they don't have time to take action on it.