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The state should accommodate voters who mistakenly appear at the wrong polling precinct or who show up at the right place but are sent elsewhere -- especially those who vote toward the end of the day and cannot get to another precinct in time, the groups said. . . .[emphasis mine]
It is unclear how many provisional ballots could be cast on Nov. 2. But Democrats estimate that thousands of eligible voters went to the wrong polling place in 2000 because of changes in the polling location, confusion or forgetting where they were supposed to vote.
Provisional ballots are not counted on Election Day. They are reviewed within a six-day period after the election. If officials can verify that a voter is registered and has shown proper ID, the ballot is counted.
"Federal Judge Says Michigan Must Count Provisional Ballots in Wrong Precincts". Detroit Free Press. 19 Oct 2004.