Background
The 1,030 R142 cars have Alstom ONIX AC propulsion, electronic braking, automatic climate control, and an on-board intercom system. The R142 and the R142A was partly designed by Antenna Design.
The first R142s were delivered in November 1999. Regular service began in mid-2000 after several months of testing. The R142s and R142As replaced all of the Redbirds—the R26, R28, R29, R33, R33 WF, R36 and R36 WF IRT cars by late 2003.
There are two types of cars: "A" (cab at one end) and "B" (no cabs). "A" cars are powered with four traction motors each. "B" cars are powered by two traction motors at the number two end (car ends are numbered on the lower body just above the truck). The trains are linked up in A-B-B-B-A sets (Bo'Bo'-Bo'2'-Bo'2'-Bo'2'-Bo'Bo), but also can be linked in sets of 4, 6, 9, or 11 cars.
The R142s currently operate on the 2, 4 and 5 services.
Read more about this topic: R142 (New York City Subway Car)
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