Skills needed to determine when it is "clear to cross"
if you are in a Situation of Confidence

Using hearing you need to:

know what to listen for and be able to "tune in" to those sounds;
be able to determine when it is quiet enough to be "all clear" (understand the effect of masking sounds)

using vision

you need to:

know what to look for and how to see it effectively and reliably;
be able to determine it is "all clear" by scanning / glancing left/right efficiently

If you can see traffic at a distance you can determine whether you still have time to cross if you can:

determine if the time-to-arrival of the approaching traffic is long enough to cross and
make this determination by glancing / scanning to each side.

If you have usable vision and hearing, you need to understand:

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