If you mean intersection as in "a street intersection" or a point at which two lines cross then use the INTERSECTION sign:
INTERSECTION / "at the corner of" / block
If you mean "to intersect" then use the "intersect" sign:
INTERSECT / conflict / cross each other
Note: The "intersect" sign is similar to one of the versions of the sign for "CONFLICT." If the meaning isn't clear via context and you need to distinguish between the two concepts you could add an "annoyed" or "mad" facial expression to this sign to cause it to mean "conflict" rather than "intersect."
See: CONFLICT
Notes: