If you have a double-yellow stripe in the center of the road, then you are not allowed to pass. Same rule applies to a single yellow stripe, or when a solid line is on your side and a dotted line on the other.
When approaching an intersection, you should never drive on the left half of the roadway when within 250 feet.
When approaching an intersection, bridge, or railroad crossing, you should never drive (pass) on the left half of the roadway when within:
100
When within 100 feet (about five car lengths) of or crossing an intersection or railroad crossing.
You may not cross a double yellow line or drive to the left side of the roadway when approaching within 100 feet of an intersection or a railroad crossing.
You may not cross a double yellow line or drive to the left side of the roadway when approaching within 100 feet of an intersection or a railroad crossing.
When within 100 feet (about five car lengths) of or crossing an intersection or railroad crossing.
38
Sounds like a warning of what Americans would call a railroad crossing ahead...
It is the California Vehicle Code (CVC) for stop requirements. 22450. (a) The driver of any vehicle approaching a stop sign at the entrance to, or within, an intersection shall stop at a limit line, if marked, otherwise before entering the crosswalk on the near side of the intersection. If there is no limit line or crosswalk, the driver shall stop at the entrance to the intersecting roadway . (b) The driver of a vehicle approaching a stop sign at a railroad grade crossing shall stop at a limit line, if marked, otherwise before crossing the first track or entrance to the railroad grade crossing. (c) Notwithstanding any other provision of law, a local authority may adopt rules and regulations by ordinance or resolution providing for the placement of a stop sign at any location on a highway under its jurisdiction where the stop sign would enhance traffic safety. Amended Sec. 8, Ch. 630, Stats. 2007. Effective January 1, 2008.
Drive slowly
The question is not very clear, but it sounds as if you would be approaching a division in the roadway (perhaps a traffic island) where the roadway separates.
12 feet.
Any grade crossing that has no warning devices, signs, or anything... or even one that is malfunctioning has the train stop or slow down for it. A conductor will either get off and flag the crossing by stopping cars and letting the train through with a flag or a flare will be lit and cast into the roadway. The horn, of course, would be honked as normally.
A blind curve is a dangerous curve on a roadway in which drivers cannot see approaching traffic.