Sir - The Government's plans for eco-towns are certainly stoking up some interesting debate. David Eldridge (Letters, March 28) says one would hope that by the time such eco-towns are built, the government of the day would have the sense to have planned ahead.

In this case, increasing the capacity of the Oxford-Banbury line by-re-signalling and providing trains adequate to seat people in comfort. Dream on, Mr Eldridge.

At the same time, Hugh Jaeger thinks I am ambivalent about the Weston-on-the-Green proposals in relation to their impact on the M40 J9. It is abundantly obvious that a new town of 15,000 homes will completely clog the junction without major reconstruction.

What is also emerging is that the huge amount of infrastructure that the developers are offering, including junction improvements, is simply not affordable out of the profits from 15,000 homes.

My primary fear remains that this shiny new eco-town would do nothing to revitalise neighbouring Bicester and would simply cast it into a deep economic shadow. That is simply not acceptable.

Whether it is Weston-on-the-Green or Shipton-on-Cherwell, the huge number of houses proposed at either location would clearly increase travel by private car substantially. A few may walk or cycle if there is employment close at hand but many will not. Unless bus and train services can be dramatically increased, congestion on local roads will grow to unacceptable levels.

Keith Mitchell, Leader, Oxfordshire County Council