Train operator First Capital Connect (FCC) is adding 11 trains to its fleet that will see new services come online and current services offer longer trains at peak hours.
The new timetable will improve services to Moorgate from Bowes Park, Alexandra Palace, Hornsey, Harringay and Finsbury Park stations, among others, says FCC.
To cope with the extra trains, FCC needs to expand its maintenance facility by Wightman Road, south of Hornsey rail station, Harringay
as Councillor Alexander has flagged up
The upgraded services and the maintenance facility, yet to be approved by Haringey Council, will create 28 new jobs.
The extra trains mean staff will have to clean the interiors 24 hours per day from a new 125-metre platform, protected by a canopy, that will sit next to the existing maintenance shed.
Roger Perkins, FCC spokesman, said: "The very modest train cleaning facility is part of a major plan to introduce thousands of new seats to our rush-hour commuter services into London this December.
"We've listened to our customers and know that overcrowding is one of their biggest concerns. By securing an extra 41 train carriages we will be able to provide new services and lengthen others - in many cases doubling capacity on trains."
Services running against the rush hour commute will also be improved.
EXTRA TRAIN SERVICES
BOWES PARK: 3 new six-carriage AM services, one existing service doubled in length
ALEXANDRA PALACE: 1 new AM service, 1 existing service doubled in length; 3 new six-carriage PM services, 2 existing services doubled in length
HORNSEY & HARRINGAY: 1 new AM service, 1 existing service doubled in length; 2 existing PM services doubled in length
FINSBURY PARK: 5 new six-carriage AM services to Moorgate or King's Cross, 6 existing services doubled in length; 3 new six-carriage PM services, 6 existing services doubled in length, 1 existing service upped from four to six carriages.