Although Brussels' Central Station is at the very heart of the city, its capacity is not adapted to present usage levels ( 70,000 passengers on a weekday), let alone future levels. The interior and the platforms have been renovated in recent years, but the main problem (i.e. lack of capacity) has not fundamentally been addressed. There have been suggestions to expand the station, but none of them has gained widespread acceptance. Today, at peak times, about 96 trains an hour use the six platforms of the station. With passenger growth expected to average 4% per year in the coming decade, Infrabel, the administrator of the Belgian rail network, has determined that an expansion of the rail capacity and of the Central Station will be necessary. The CEO of Infrabel has estimated the cost of an adequate expansion at least €1 billion, and has said it will be necessary to complete the project by 2020. However, the task of getting all relevant authorities to agree on a plan has so far proved difficult. Some credit a general taboo against discussions of expanding the North–South rail axis as a result of the history of extended delays and widespread destruction of neighbourhood blocks that the initial construction brought between 1911 and 1952.