TxTag Starter Kit
Here’s a brief rant about the design of TxTag, an automatic toll service in Texas. It boils down to confusion about whether the number on the assigned card should match the number on the welcome letter.
On closer inspection it looks like there are actually two numbers on the welcome letter; one for each vehicle. From that point of view it seems reasonable to conclude that since the card couldn’t possibly match both of them, it might not need to match either. But if the driver had only one automobile it wouldn’t be as easy to rationalize away the difference. The Texas department of transportation could head off confusion without necessarily changing their numbering scheme by making a few information design refinements to the welcome letter.