to those on the R62A sets that were previously used on the , which are now on the . This modification was done to make it easier for passengers to differentiate between an express or a local train. In the following year, car 7501 had the LCD destination indicator parts of its destination signs replaced with LED panels to make it aesthetically similar to the aforementioned route display. Cars 7505 and 7503 received the same modifications in mid-2019 and mid-2020, respectively. It is currently unknown if the remainder of the rolling stock will be retrofitted with these features. In April 2017, car 7502 was equipped with a special test truck, replacing the original truck found on other cars. In September 2018, cars 7847–7848 were fitted with new LCD advertisement screens, replacing the traditional paper advertisements that are usually located there. History Timeline of contracts At the time that the R188 order was placed, 40 eleven-car sets of R62As 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 the MTA, totaling a possible 506 cars, or 46 eleven-car trains. Of these 506 cars, 230 are arranged in five-car sets while the remaining 276 are arranged in six-car sets. Six extra R188 trainsets were ordered in conjunction with CBTC installation and 7 Subway Extension. The trains are configured so that the five-car consist on each train is located on the Manhattan-bound end and the six-car consist is located on the Main Street-bound end, due to the position of conductor's boards on platforms along the 7 route. 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 eleven-car trains, while the remaining 36 cars were to be "C" cars that would go to expanding 36 CBTC upgraded R142A five-car sets (360 existing cars) to six-car lengths. The original planned total of 46 eleven-car trains (506 cars) would still result from this order. In the latest revision, however, only 88 new cars were to be purchased to form 8 new eleven-car trains, with 38 "C" cars, rather than 10 eleven-car trains. Likewise, the number of conversion cars was altered to 370. This change was made because only two sets of ten-car