It is my belief that we are just trying to determine that the individual who appears before us to vote is the person on the photo identification being presented by the voter.  If election officers have to look for expiration dates on various types of photo identification, we could start to see delays in the voter check-in process, resulting in increased wait times.  As others have stated, we can still use an expired photo id to validate the person before us.  Whether or not they can drive or travel should not impact their right to vote.