In many areas around here the "pedestrian crossing" rules say that vehicles must yield to any pedestrian in the crosswalk. Vehicles must remain stopped until anyone in the designated walkway is clear.

They also prohibit a pedestrian from entering the crosswalk except when the "run like hell now" signal is lit.

There is thus a very short time to get into the crosswalk, but there's no violation for not getting across and out on the other side.

The only consequence of not completing your crossing by the time the signal flips off would be the broken bones and lacerations from the drivers who don't understand the rules.

John