Red
Reflectors indicate the direction of traffic flow and are typically placed on the right side for drivers to see when they are traveling in the correct direction. Seeing a reflector on your left side could indicate that you are driving the wrong way, but it doesn't necessarily guarantee a head-on collision; it's important to adjust your position to ensure you are driving in the correct direction.
yes
yes
The reversing car attempting to park would be at fault. The car already traveling in the road would have the right of way since they are already properly in motion and traveling in the correct direction of traffic.. The reversing car would be traveling against the flow of traffic and has an obligation to ensure that the way is clear before reversing.
You should bike with traffic, in the same direction as cars are moving.
It is safer to ride your bike with traffic, in the same direction as cars.
You should ride a bike with traffic, in the same direction as cars.
You should ride your bike with traffic, in the same direction as cars.
Bicycles should ride with traffic, following the same direction as cars on the road.
Bikes should go with traffic, following the same direction as cars on the road.
To indicate that traffic in that lane is flowing in the same direction as you are traveling.
That is false. At least in America. Solid yellow lines are the means to separate traffic traveling in an opposite direction. A solid white line marks the outside edge of your lane, or the outside edge of the lane traveling in your direction. Meaning you'll either go into the shoulder, or off the road entirely, if you go over the solid white line.