During the 1950s , both railways hoped that major investment plans ( BTC 1955 ; RENFE 1950 ; 1957 m : ix ) would allow them to modernize , reduce costs and attract sufficient traffic to break even .
During the 1950s , both railways hoped that major investment plans ( BTC 1955 ; RENFE 1950 ; 1957 m : ix ) would allow them to modernize , reduce costs and attract sufficient traffic to break records .