Hawaii's redesigned driver's licenses are failing to scan at TSA checkpoints and stores, leaving some residents stuck at the airport without backup ID.

• The new cards rolled out this summer were meant to fix earlier scanning problems, but travelers say the failures are back.
• A Maui resident says her card has failed at every airport since she got it, and agents asked for a passport she wasn't carrying.
• She only got through because another agent knew the ID could be entered by hand.
• The company that makes the licenses says the cards meet industry standards and blames nothing on the design so far.
• Honolulu officials say they logged only two complaints in September, and residents say no one has told them what to do next.

Outlook: The card vendor is working with TSA and the reader manufacturer to find the cause, so travelers should carry a second form of ID until it's fixed.