Two solid yellow lines down the center of the road indicate that passing is illegal for both directions (your direction and the opposing direction). There are times when you have to cross over that solid yellow line, one instance would be moving over to the left side of the road due to a stopped emergency vehicle on the side of the road, but remember, the oncoming traffic has the right of way in this instance.
A steady yellow X posted above a highway lane indicates a driver to change lanes. A flashing yellow X means left-turn movements only.
I think it is A. Vehicles Should Move Slowly.
Passing is prohibited in that laneNo Passing
divided highway
help
A steady (instead of flashing) yellow light means the traffic signal is changing from green to red. You must stop if it's safe to do so. If you're already stopped you must not proceed.
Double yellow lines, which are solid and not dotted, indicates a no passing zone.
In science, a yellow label indicates a medium hazard level.
no passing
Double solid yellow is between two lanes of traffic with oppsing directions. This indicates no passing a vehicle that is traveling the same direction by moving to the oposing lane momentarily. You have to stay in your lane. Solid white is a line between two lanes going the same direction, but indicates changing lanes is not admissable unless safety concerns exist. Again, you have to stay in your lane.
No, the color signifies nothing in particular. The yellow color of the line simply conforms to to the National Standards for highway markings. If the line is 'dashed' you may pass, If it is solid (or there are two unbroken parallel lines) it is a no passing zone.
For a steady (not blinking) yellow engine light: That indicates a fault with the engine or one of it's systems. It's usually an emissions related fault. Often caused by a loose gas cap.
On traffic lights it means slow down.