Know more about parking time unit

To discourage long-term parking at on-street metered parking spaces. Electronic Parking Meters (EPMs) sell parking time in 15-minute unit (parking time unit). When a user buys additional parking time from an EPM, if the residual time of the lapsing parking-time unit is less than 13 minutes, such residual time is non-cumulative. i.e. the residual time of the lapsing parking-time unit will be superseded by just a full 15-minute parking time unit in the first re-purchase. (see diagram)

Diagram

Using a 1-hour parking meter as an example, there are 4 parking time sections as follows:

Example

Residual Time shown on parking meter

Lapsing time section

Time section retained

First purchase of new parking time (e.g. purchase of 15 minutes)

Total parking time

1

20 minutes

B

A

Jump to the end of time section B

Time section A+B =30minutes

2

43 minutes

C

A+B+C

Jump to the end of next time section D

Time sections A+B+C+D =60minutes

3

59 minutes

D

A+B+C+D

Jump to the end of time section D

(maximum time is 1- hour)

Time sections A+B+C+D =60minutes