I thought that the under dash tray was very usefull, but on some toll streets it is usefull to have a handy cardholder for credit card or toll billets

2023-15-09 small update, I made the card slot a bit larger and erased a small hump inside, which I included to hold the card, not necessary. The former design worked great, but had problems with embossed card which were thicker (double) than the other.