Train operators are calling for widespread expansion of the existing rail network, with 14 extra lines and about 40 new stations proposed.
The Association of Train Operating Companies said there was a need for expansion to cope with rising demand.
It said the expansion, which would cost £500m and possibly reuse lines closed under the 1960s Beeching cuts, could serve more than 1m extra passengers.
Any decisions on future expansion rest with government and Network Rail.
