Left Turn Only vs No Right Turn

[Zod]

I've wondered this for a while:

legally, at a T-junction is there any difference between a blue Left Turn Only sign and a red and white No Right Turn sign? Is there any reason to choose one over the other? Both are circular and therefore orders.

[Magic919]

In areas where there are lots of idiots it's better to use no right turn.

[over_the_hill]

In my experience (possibly not always) the Blue signs are when you are turning into a one way street or onto a DC where to turn the other way would put you in danger of a head on.

The red circle "No Turn" sign is usually more of a traffic management thing i.e. they don't want massive queues building up at the junction while people try and turn right across two lanes of a busy road, or they just don't want vehicles going that way

[hairyben]

From my observations, blue arrow is for when there's only one route to go.

no turn is used more often when it's easy to hide a little one in a clutter of street furniture and perfectly possible, safe and reasonable to do said turn but for the hidden camera going "click kerching!" "click kerching!" "click kerching!" "click kerching!"

[eybic]

I got 3 points for ignoring one of the white straight ahead arrows on a set of lights about 15 years ago and the offence code was TS10 which is the same as going through a red light, I went through the centre of a big roundabout rather than all the way round.