What does the no right turn sign mean?

This sign is posted at an intersection where you had planned to turn right on a red light. What does it mean for you?

You may not turn right here at all, on any signal

The sign removes the right turn from this intersection completely, so the colour of the light makes no difference to it. Bans like this usually protect a crossing, a bike lane or a sightline that the turning driver cannot judge from the stop line.

The light ahead of you is red and this sign is mounted beside it. What does it mean for the right turn you planned?

You may not turn right here at any time

A right turn on a red light is normally allowed after a full stop, and this sign takes that permission away. It also bans the turn on a green light, because the reason for the sign is usually a busy crosswalk or a cycle lane that turning traffic would cut across.

You are first in line at a red light with this sign beside the signal. You have stopped completely and the way is clear. May you turn right?

No, the turn is not permitted here, on a red light or a green one

A right turn on a red light is only ever allowed where nothing prohibits the turn, and this sign is exactly that prohibition. It bans the movement itself, so waiting for the green does not help either. Signs like this go up where the turn would cross a busy crosswalk or feed into a lane with a poor sightline.

You are stopped at a red light and this sign is posted beside the signal head. What does it change about your options?

You may not make that right turn at all, on any signal

This sign bans the movement itself, not just the turn on a red. A green light gives permission to proceed where turns are allowed, and it never overrides a sign that forbids one. If that was the turn you needed, go straight on and come back around.

You are in the right lane and this sign faces you. There is no plate under it and no wording of any kind. What may you still do?

Go straight through, or turn left if left turns are allowed here

With no plate under it, the ban runs at all times and under every signal. The sign says nothing about the other movements, so straight ahead and a permitted left turn are both still open to you.

This sign is posted at the intersection you are approaching. How far along the street does the ban reach?

To this intersection only

A prohibition sign controls the movement at the place where it stands, and the next intersection is governed by whatever signs it has of its own. Drivers who read a sign as though it covered a whole street either take detours they do not need or, worse, assume a later turn is banned and change lanes late when they find out it is not.