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The R188 is an A Division car for the New York City Subway. The MTA is displacing the R62As from the with these cars to automate the IRT Flushing Line. The R188 is part of both the fourth and fifth generation of New York City Subway A Division rolling stock; many fourth-generation R142As are being converted to R188s, along with deliveries of new R188 cars. In addition to providing six extra 11-car trains for the 7 Subway Extension, the R188s will allow twenty R62A cars to be freed up for the other IRT services. ==Timeline and composition of trainsets== At the time that the R188 order was placed, forty R62A 11-car trainsets were assigned to the 7 service. The R188 order originally consisted of 186 new cars, as well as 131 converted R142A cars compatible with communication-based train control (CBTC) and an additional 189 R142A conversion kits for MTA, totaling a possible 506 cars, or in other words, 46 11-car trains. Given this number, it can be deduced that 230 of these cars will be arranged in 5-car sets while the remaining 276 cars will be arranged in 6-car sets.〔http://www.thejoekorner.com/cars/r34188sol.pdf〕 Six extra R188 trainsets were ordered in conjunction with CBTC installation and 7 Subway Extension. According to the 2010–2014 capital plan, 146 new cars were to be purchased. Of these new cars, 110 cars would go to make up 10 new 11-car trains, while the remaining 36 cars were to be "C" cars that would go to expanding 36 CBTC upgraded R142A 5-car sets (360 existing cars) to 6-car length. The original planned total of 46 11-car trains (506 cars) would still result from this order.〔(Page 92 )〕 In the latest revision, however, only 88 new cars were to be purchased to form 8 new 11-car trains, with 38 "C" cars, rather than ten 11-car trains. Likewise, the number of conversion cars was altered to 370. This change was made with the knowledge that only two ten-car R62A growth sets for the mainline IRT would be needed, as opposed to the projected four sets, and thus the MTA and Kawasaki opted to convert two additional R142A train sets in place of manufacturing two new sets. The MTA also decided to have Kawasaki perform all of the conversions at the Yonkers plant instead of 207th Street Shop as part of that contract modification.〔http://i42.tinypic.com/r2oqb8.jpg Modification to purchase document〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「R188 (New York City Subway car)」の詳細全文を読む スポンサード リンク
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