The downturn in the economy and significant cost increases and delays associated with building and operating the Northwest Corridor led to the initiation of the year-long `` Northwest Area Mobility Study '' .
DET NOUN ADP DET NOUN CCONJ ADJ NOUN NOUN CCONJ NOUN VERB ADP NOUN CCONJ VERB DET PROPN PROPN VERB ADP DET NOUN ADP DET ADJ `` PROPN PROPN PROPN PROPN '' .