Most expressways use a card system. Upon entrance to an expressway (or to a toll portion of the expressway), an entry card is handed over to the driver. The tolls to be paid are determined from the distance traveled when the driver hands the entry card back to the exit toll gate upon leaving the expressway. A small number of expressways do not use a card system but charge unitary fares. Passage through these expressways is relatively faster but it is economically less advantageous. An example of such an expressway would be the Jingtong Expressway.