TfL have very kindly provided data showing how many journeys make use of each OSI in the system. The data was recorded over a four week period in June/July 2018. Unsurprisingly the most popular ones are interchanges between National Rail terminals and Underground stations. There are some surprises, including the accessible route OSI at Woodford which wasn’t used at all. I’m also curious as to why so many people still walk between Hackney Downs and Central when there is a footbridge within the paid areas linking the two stations.
New OSI at Tottenham Court Road
A new OSI was activated between gatelines at Tottenham Court Road towards the end of September. There’s a 10 minute allowance either way. The OSI List has been updated (including the change history).