Installation of subway platform doors in NYC would face challenges

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Technological challenges would pose major obstacles to the installation of platform doors in New York's subway system, transit officials said Monday.http://feeds.feedburner.com/~ff/rss/cnn_us?d=yIl2AUoC8zA</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=ac83GXYwUR4:fNHtfZVB7Yg:yIl2AUoC8zA) http://feeds.feedburner.com/~ff/rss/cnn_us?d=7Q72WNTAKBA</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=ac83GXYwUR4:fNHtfZVB7Yg:7Q72WNTAKBA) http://feeds.feedburner.com/~ff/rss/cnn_us?i=ac83GXYwUR4:fNHtfZVB7Yg:V_sGLiPBpWU</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=ac83GXYwUR4:fNHtfZVB7Yg:V_sGLiPBpWU) http://feeds.feedburner.com/~ff/rss/cnn_us?d=qj6IDK7rITs</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=ac83GXYwUR4:fNHtfZVB7Yg:qj6IDK7rITs) http://feeds.feedburner.com/~ff/rss/cnn_us?i=ac83GXYwUR4:fNHtfZVB7Yg:gIN9vFwOqvQ</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=ac83GXYwUR4:fNHtfZVB7Yg:gIN9vFwOqvQ)
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