19 a painted curb designates an area where there is no stopping, parking, loading, or standing.

A Yellow painted curb designates an area where there is no stopping, parking, loading, or standing.

Explanation:

When we have a Curb paint and signs can be used to help convey a specific message to drivers. A painted curb means that you must follow special parking rules. Painted curbs are usually around a school to inform drivers where parking and stopping are allowed or prohibited".

For our case the yellow color means this:

"Stop only long enough to load or unload passenger, no longer than posted. Drivers are usually required to stay with their vehicle".

So for this case a yellow line indicate that this area is not the ideal to stop the car, parking, loafding or standing.

i'll just take the points xd