Research of Automatic Ticket Checker

Record format (F2F)

This record format is mainly used by organizations who started to use an automatic ticket checker from 1990s. Recordable data is large than the NRZ-1 format. Because a record density is going up, it's difficult to analysis in a naked eye(I expand and analyze with scanned image on a screen).

Edmondson ticket

Read the data in the direction of the long side. If an interval of a vertical line is 0.25mm, it means "1". If an interval of a vertical line is 0.5mm, it means "0".

The above figure is different from actual data, because data is "0" except preamble/postamble (Checksum is not calculated). Moreover, the blue and red line is added in order to be easy to see a bit position.

Recorded data on each tracks is as follows.

Track A

Bit	Contents	Notes
1-4	Preamble	It means a start of data. The content is "1111"
5-16	End of effective date (month and day)	Month, day (tenths place), day (ones place)
17-32	Origin station	Line, station
33-42	Sections of origin station
43-58	Transfer station	Line, station
59-72	Sections of transfer station
73-76	Ticket type
77-80	Checksum
81-84	Postamble	It means an end of data. The content is "0111"

Track B

Bit	Contents	Notes
15-18	Preamble	It means a start of data. The content is "1111"
19-30	Start of effective date/Boarding date	Month, day (tenths place), day (ones place)
31-46	Boarding station code
47-58	Boarding date
59-62	Reserved
63-66	Entering/Exiting code
67-70	Checksum
71-74	Postamble	It means an end of data. The content is "0111"

Track C

Bit	Contents	Notes
1-4	Preamble	It means a start of data. The content is "1111"
5-20	via 1	Line, Station
21-36	via 2	Line, Station
37-52	via 3	Line, Station
53-68	via 4	Line, Station
69-76	Ticket type
77-80	Checksum
81-84	Postamble	It means an end of data. The content is "0111"

(Updated on 2022/7/18)