Progressive toll

Progressive toll is a form of toll, for a charactor is:

When a item or service use more, marginal cost will be higher.

for a example,^[1] parking for first hour is $10, second hour is $20, 3rd-4th is $30 per hour, after 5th hour, $50 an hour thereafter

so a car parking for 10 hour within, the fee will be 10+20+30*2+50*6= $390.

• YouBike adopt this Progressive toll system

References

1. http://www.pma.gov.taipei/ct.asp?xItem=917624&ctNode=13053&mp=117021