Stop Here on Red sign
When the light is red, stop at this sign rather than pulling further forward toward the intersection itself.
Federal designation R10-6a in the MUTCD, the national standard every state signs to. Placed beside a painted stop bar set back from the corner, commonly where a wide crosswalk, a rail crossing, or a signal detector needs the clearance.
How to recognise it
This sign is a wide rectangle in white, the standard background for a rule you must obey. These carry the force of law. Ignore one and you have broken a traffic rule, not just a guideline. Most are white rectangles with black text, and the handful that are not, the stop and yield signs, get their own unmistakable shapes.
What the test wants you to know
It marks the actual stop point, which is often set back from the crosswalk to protect a sensor loop, a crosswalk, or a sightline for cross traffic. Stopping past this sign while the light is red is treated the same as running the stop point at the intersection itself.
Practise it
Reading about a sign is not the same as recognising it in half a second with an examiner watching. Every state road signs test on this site shows the sign and asks you to name it, then shows four faces and asks you to pick the right one.
Stop
Yield
Do Not Enter
Wrong Way
Speed Limit
One Way