About $13.4 million will be used to replace and upgrade the catenary wire system along a 23-mile stretch of railway on the busy Northeast Corridor.

Federal agencies have approved $80 million in grants that will replace the ancient overhead wires and signal on the Northeast Corridor line that were blamed for the “summer of hell” rail problem, U.S.

That includes work on the system of wires that kept getting ensnared in NJ Transit equipment on sweltering days.