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[Entwood]

As I see that light .. it has a red on, two unlit and a green arrow .. my thoughts are this is, for some reason, only allowing straight on traffic right now, but when the normal green is on traffic can go in either direction.

This is totally understandable if, on the left turn street there is a light controlled pedestrian crossing. The signal as shown allows pedestrians to cross AND forward traffic to flow, thus reducing congestion...

just ny 2.3 p's worth (inc VAT)

[Vamps]

As I see that light .. it has a red on, two unlit and a green arrow .. my thoughts are this is, for some reason, only allowing straight on traffic right now, but when the normal green is on traffic can go in either direction.

This is totally understandable if, on the left turn street there is a light controlled pedestrian crossing. The signal as shown allows pedestrians to cross AND forward traffic to flow, thus reducing congestion...

just ny 2.3 p's worth (inc VAT)

6d   2.5p inc purchase tax.
 

[Dave-C]

Don't know the answer.  BUT, what if one was red/green colour blind, thought it was a green arrow went through and killed a pedestrian?

DC :-/

http://colorvisiontesting.com/online%20test.htm

[Paul M]

Don't know the answer.  BUT, what if one was red/green colour blind, thought it was a green arrow went through and killed a pedestrian?

DC :-/

http://colorvisiontesting.com/online%20test.htm

You generally don't get red arrows on traffic lights in this country (they're pretty common in the US at intersections). Even then, the red is always at the top and green at the bottom, so if you have that problem then it's no different to normal traffic lights with just a circle.