Question

Confused between the use of "at", "with" or "using" in this case.

Answer 1

both of them are correct but i'd suggest using the first one. instead of AT you can also use ON before 'the zebra crossing'.

Answer 2

I agrée. The ami of the phrase is on the crossing, not the user.  "Using the zebra crossing" is grammatically correct, but is a weak statement compared to the more emphatic "at the zebra crossing."