I read the following caption:
The narrow gauge train often crisscrosses the street
What's the difference between “crisscross" and “cross" this context?
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a pattern of intersecting straight lines or paths.
"the crisscross of wrinkles on his face"
Oxford Dictionaries via Google
If you crisscross a street, you create an abstract pattern of intersecting straight lines as you go across and then return to the same side, several times.
Cross is just once; She crossed the street.
She crisscrossed the street. = She went back and forth several times across the street.
If you remove the white space between those two lines of x's, that is a crisscross pattern.