in 1948, platforms on the irt broadway–seventh avenue line from 103rd street to 238th street were lengthened to 514 feet to allow full ten-car express trains to platform. previously the stations could only platform six car local trains. the platform extensions were opened in stages. on july 9, 1948, the platform extensions at stations between 207th street and 238th street were opened for use at the cost of $423,000.