The 17 Olympic lines will be free to ticket holders, and are divided into 8 regular lines and 9 express routes.
17条奥运公交专线持票免费乘坐，包括8条普线、9条快线。
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The chip in the card also allows you to tap automated kiosks for subway and train tickets, which is a time-saver if there are long lines at the ticket counter.
Doesn't sound like something you'd want to be doing every day, but when you find your eyelids drooping on a long road trip or something along those lines, a caffeine nap might be just the ticket.