Loading zone
it is a line that is slanted either left or right.
Assuming that you mean diagonal (not diagnol) lines, they are straight lines that join non-adjacent vertices in a polygon or polyhedron.
They mean that area is not a lane and should not be driven on.
Street lines
snorkeling or diving activities nearby
There are many types of symbols used in drafting. Diagonal lines, a.k.a. crosshatch, are used in orthographic views to show that the plane in which the current view lies, goes through a portion of the "part" being drafted.
America: 13 strips- 13 original colony's 50 stars- 50 states
It means that there are snorkeling or diving activities nearby.
snorkeling or diving activities nearby
The Union Jack is simply the combining of three crosses: - The cross of St Andrew; a white diagonal cross on a blue background, representing Scotland. - The cross of St George; a red cross on a white background, representing England. - The cross of St Patrick; a red diagonal cross on a white background, originally representing Ireland, now just Northern Ireland. Wales is not represented on the flag, as it was legally a part of England when the flag was designed.
Sir Lancelot's coat of arms typically features a red cross on a white background, known as the Cross of St. George. This symbol represents his Christian faith and his courage on the battlefield. The coat of arms can also include other elements to symbolize his loyalty, bravery, and chivalry.
Diagonal yellow lines before a left turn lane indicate that the area is not to be entered or used for turning. They serve as a warning that the space is reserved for specific traffic movements or to keep the lane clear for safety and traffic flow. Drivers should not cross these lines when making a left turn.