Information stored on paper tickets bearing a magnetic stripe

TechyByte Logistics and Legal made this Rhyddid Gwybodaeth request to Transport for London

This request has been closed to new correspondence from the public body. Contact us if you think it ought be re-opened.

Roedd y cais yn llwyddiannus.

TechyByte Logistics and Legal

Dear Transport for London,

I've read the FOI request made here: https://www.whatdotheyknow.com/request/p.... I would like to request a clarification of certain parts of the response, as follows:

- What is the storage capacity of the magnetic stripe? e.g. 192 bits
- Do the TfL paper tickets bear more/less fields of data then standard Network Rail tickets on their magnetic stripes? If so, please detail the additional/unused fields.
- The response specified that a "Cancelled ticket indicator" was stored on the ticket's magnetic stripe. What is the purpose of this?
- When one puts a ticket in to a barrier, where is the information on the ticket sent? Does it ever leave the barrier prior to the gates opening?
- What fields specifically are sent to 'Cubic'?
- Do tickets contain a value unique to the individual ticket within the magnetic stripe?
- Is the magnetic character encoding of ANSI/ISO character sets like in credit cards or in a proprietary character set unique to LUL?

Yours faithfully,
TechyByte Logistics and Legal

FOI, Transport for London

Dear Sir/Madam

 

TfL Ref: FOI-1883-1617

Thank you for your email received by Transport for London (TfL) on 30
December 2016 asking for information about Paper Tickets Data.

In accordance with the requirements of the Freedom of Information Act and
TfL’s information access policy, to be able to deal with your request we
will need to be provided with your full name. Section 8 (1)(b) of the FOI
Act indicates that the name of the applicant should be used when
requesting information and not any other name, for example, a pseudonym.

We will not be able to begin dealing with your request until this matter
is resolved.

Yours sincerely

Paulina Tuffour

FOI Case Officer

 

FOI Case Management Team

General Counsel

Transport for London

 

 

 

dangos adrannau a ddyfynnir

TechyByte Logistics and Legal

Dear TfL,

Please accept my apologies for not signing the original request. Please see below.

Yours sincerely,
George Hynes
TechyByte Logistics and Legal

Tuffour Paulina, Transport for London

Dear George Hynes

 

TfL Ref: FOI-1883-1617

 

Thank you for your email received by us on 30 December 2016 asking for
information about Paper Tickets Data.

 

Your request will be processed in accordance with the requirements of the
Freedom of Information Act and TfL’s information access policy. 

 

A response will be provided to you by 31 January 2017.  We publish a
substantial range of information on our website on subjects including
operational performance, contracts, expenditure, journey data, governance
and our financial performance. This includes data which is frequently
asked for in FOI requests or other public queries. Please check
[1]http://www.tfl.gov.uk/corporate/transpar... to see if this helps you.

 

In the meantime, if you would like to discuss this matter further, please
do not hesitate to contact me.

 

Yours sincerely

 

Paulina Tuffour

FOI Case Officer

 

FOI Case Management Team

General Counsel

Transport for London

 

 

 

dangos adrannau a ddyfynnir

FOI, Transport for London

1 Atodiad

Dear George Hynes

 

TfL Ref: FOI-1883-1617

 

Thank you for your email received by us on 30 December 2016 asking for
information about Paper Tickets Data.

 

Your request has been considered in accordance with the requirements of
the Freedom of Information Act  and our information access policy.  I can
confirm that we hold  the information you require.

 

- What is the storage capacity of the magnetic stripe? e.g. 192 bits

Yes, 192 bits.

 

- Do the TfL paper tickets bear more/less fields of data then standard
Network Rail tickets on their magnetic stripes? If so, please detail the
additional/unused fields.

Tickets issued by TfL (ie LU/DLR) ticket machines code only zeros in
fields referred to by the Rail Delivery Group (formerly known as RSP) as
Origin, Destination, Route and Date/Mode. All other fields are used by
machines operated by both TfL and NR.

 

- The response specified that a "Cancelled ticket indicator" was stored on
the ticket's magnetic stripe. What is the purpose of this?

To indicate that the ticket is not valid for further travel.

 

- When one puts a ticket in to a barrier, where is the information on the
ticket sent? Does it ever leave the barrier prior to the gates opening?

 No information on a specific ticket is sent anywhere, though counts at 15
minute intervals broken down by ticket type, passenger type and discount
are sent to the Central System. No information leaves the gate prior to it
opening.

 

- What fields specifically are sent to 'Cubic'?

Please see answer above relating to the Central System, which is operated
by Cubic as TfL’s contractor.

 

- Do tickets contain a value unique to the individual ticket within the
magnetic stripe?

No.

 

- Is the magnetic character encoding of ANSI/ISO character sets like in
credit cards or in a proprietary character set unique to LUL?

The encoding standard used is F2F.

 

If this is not the information you are looking for, please do not hesitate
to contact me.

 

Please see the attached information sheet for details of your right to
appeal as well as information on copyright and what to do if you would
like to re-use any of the information we have disclosed.

 

Yours sincerely

 

Paulina Tuffour

FOI Case Officer

 

FOI Case Management Team

General Counsel

Transport for London

 

 

dangos adrannau a ddyfynnir

TechyByte Logistics and Legal

Dear Paulina Tuffour,

Many thanks for your response. I'm satisfied with the information you've provided.

Yours sincerely,

TechyByte Logistics and Legal