The closure was made as part of changes to the town centre to make social distancing easier during Covid-19.
But analysis has revealed that footfall in the lower High Street remains too low to justify the closure and businesses such as Huffkins cafe as well as shoppers will now benefit from the easier access.
Cllr James Mills, Leader of West Oxfordshire District Council, said: “We have always made it clear that we will adapt these temporary measures in the light of experience.
“We have listened to residents and businesses, looked at the number of people in the lower High Street and decided to lift the restrictions. We will continue to monitor the situation and adapt accordingly.”
Changes made to the upper High Street and Market Square are working well with pedestrian flows recovering, justifying the measures introduced to aid social distancing.