The Railways are positioning the Economy AC-3 as a new AC Class, offering travel at fares lesser than the normal AC-3. The extra berths are being squeezed in to increase coach capacity from 64 to 72 berths — it will, however, reduce the comfort level. A ticket in Economy AC-3 may cost up to Rs 50 less than an AC-3 ticket. To start with, the Durontos, like the one between Sealdah and Delhi, will have coaches designed and manufactured by the Integral Coach Factory (ICF), Chennai. The Economy AC-3 coaches will be similar in overall dimension to normal AC-3 coaches but will have more berths squeezed in.