"Under federal law, the transit authority must find replacement housing deemed 'comparable,' a phrase that officials have interpreted to mean an apartment of a similar size and rent, in the same neighborhood or nearby. If the tenant chooses a more expensive replacement, the authority must pay the difference in the rent for three and a half years.
But New York's real estate market makes this an onerous task. Many of the residents live in rent-regulated units that cost far less than similar ones in the neighborhood. Rents could be an additional $1,000 a month."
Thanks to Alek Miller