Many cities have been laid out that way ... Salt Lake City, UT is a good example.
Others were not, even though they have a straight-grid layout. Washington DC is an example.
Most older cities have no regular layout. Their streets are the paths "wherever the cows walked".
one direction
lines of latitude are horizontal lines that form circles and that run in the same direction as the equator
Yes. Rafters and flloor joists do not have to run the same direction.
Parallel folds
Having avenues run north-south and streets run east-west helps with navigation and orientation in a city grid system. It makes it easier to determine which direction you are facing and simplifies giving and following directions. This layout also aids in urban planning and organizing city infrastructure efficiently.
you have to input the same direction anywhere twice
Generally, the streets run north and south (Arcade Street), while the avenues run east and west (Larpenteur Avenue). But, that being said there are streets that run east and west (3rd Street) and avenues that run north and south (Century Avenue).
purple lines.
Parallels would be 2 or more lines that run in the same direction and do not intersect.
There are no parallel lines that run FROM the equator. Lines that are parallel TO the equator are the latitudes.
To determine the direction of the wood grain for sanding, run your hand over the surface of the wood. The direction that feels smoothest is the direction of the grain. Sand in the same direction as the grain to avoid damaging the wood.
purple lines.