Hub opened. On November 22, the last of 114 rafters was installed. Also by this date, one crane had been disassembled and painting of the hub continued. On May 7, 2015, Platform B and the remaining half of Platform A opened, and Platform C closed. A few weeks later on May 29, the entrance to the observation deck in the West Concourse was opened on the same day One World Observatory also opened. In late September, the temporary new West Walkway opened with access from the platforms to the West Concourse. Cost and delays The Transportation Hub has been described as either one of the world's most expensive train stations, or the world's single most expensive station, for its massive reconstruction cost of approximately $4 billion. By contrast, the proposed extension of the Newark–World Trade Center PATH service to Newark Liberty International Airport is projected to cost $1.5 billion. The hub was also criticized for its delays, as the hub was completed almost 10 years later than originally projected. However, even the original cost projections for the hub were high, as the original proposal was projected to cost almost $2 billion. The high cost for a single station is attributed to the extravagant design, which stems from the Port Authority needing to convince the government of New Jersey to pay for a project situated entirely in New York. Originally, the reconstruction was to be funded by the Federal Transit Administration, which gave approximately $1.9 billion to the project. The costs of the hub were still expensive, but it was to be finished at budget in 2009. In 2014 dollars, the cost of the hub was estimated at $4 billion. The hub cost twice as much in 2014 as it should have originally cost in 2004. The West Concourse cost $225 million and was billed as the "world's most expensive hallway". Construction, maintenance, and management alone cost $635 million; the Port Authority awarded several subcontracts, most of them costly. The fees of the main construction team took up almost a billion dollars, and utility installation around the entire World Trade Center site cost another $400 million. Over $500 million in cost savings was overlooked. The design was costly, with Calatrava netting $80 million in design fees and the overall architectural design being another $405.8 million. Speeding up the pace of construction also contributed to the higher cost, with $100 million dedicated