Engineering work at Oxford over the next four weekends means there will be major changes to Cotswold Line train services.
No trains will be running through the city during the weekends of September 10-11, 17-18 and 24-25, as well as October 1-2, with buses replacing trains between Oxford and Hanborough station on the Cotswold Line and on the lines to Oxford Parkway, Didcot Parkway and Banbury.
Network Rail engineers will be installing new high-speed points at Oxford North junction, where the line towards Oxford Parkway and Bicester leaves the main line, and carrying out other work in the Oxford area as preparations begin for a major upgrade of Oxford station over the next two years.
Network Rail and Great Western Railway are urging passengers to plan ahead and check train and bus times before travelling.
There will be regular rail replacement buses operating each weekend between Hanborough, Oxford station, Oxford Parkway and Didcot Parkway, for connections to and from Reading, Slough and London Paddington.
Rail passengers will also be able to use their train tickets on a number of local bus services, including the Stagecoach route S3 between Charlbury, Woodstock, Oxford Parkway station and bus stops in Oxford city centre.
Chiltern Railways trains will continue to operate between Oxford Parkway and London Marylebone during the weekend closures, with a bus link available between Oxford Parkway, Oxford city centre and Oxford station.
Strike action by rail unions due to take place on September 15, 17, 26 and 27 will also disrupt train services during this period, if the walkouts go ahead.
Click here for travel information and details of the plans to improve Oxford station. A link can also be found on the page to more detailed information about GWR services and ticket acceptance on alternative routes between London Paddington and stations in Worcestershire and Herefordshire during the weekend closures.