On 12 Jan, 10:52, Matthew Dickinson
wrote:

On 11 Jan, 02:27, Mizter T wrote:

On 11 Jan, 01:35, Richard wrote:

On Sat, 10 Jan 2009 16:41:01 -0800 (PST), Mizter T

wrote:
The obvious solution would be for SWT to fit readers that accept
*both* Oyster and ITSO-type smartcards within the London zones, but
perhaps that's somewhat easier said than done!

TfL have done it, on buses in Harrow was it? *SWT also have, of
course, many gatelines that are equipped for Oyster and will in future
also accept their own ITSO cards. *The Oyster-ITSO differences will
cause various bits of the system to cost more but the problem isn't
the technology though, is it? *If SWT want more £££s, it's because
they can.

Re the point about the combined Oyster-ITSO readers, you are of course
totally right - they are hardly an impossibility, indeed to the
contrary they are in essence a requirement for all SWT gatelines in
London.

I don't know anything about the TfL experiment in Harrow (or wherever)
but it sounds interesting.

It was in Brentford. see

http://www.dft.gov.uk/pgr/scienceres.../itsooysterint...

Appendix D on p 81


Thanks for that. I think I might have that document saved somewhere in
my virtual 'to read' pile after it made a previous appearance here,
but I evidently haven't read it. I will!

A brief glance suggests there were some issues - specifically, from
that executive summary:
"In this pilot, such impacts were not permitted to affect the Oyster
processing times, however this was at the
expense of ITSO card validation times that were very high."