3200 series (Chicago "L")

The 3200 series (numbered 3201–3457) is a series of Chicago "L" car built between 1992 and 1994 by Morrison-Knudsen of Hornell, New York. 257 cars were built. As of 2016, 253 of them remain in service. The bodyshells of these cars were built by Mafersa, of Brazil, as a subcontractor to Morrison-Knudsen.

The 3200 series was the last series of five interoperable series of Chicago "L" cars known as the High Performance Family and the last railcars ordered for the Chicago Transit Authority that use direct current motors. Future train orders are using alternating current motors.

The original order for 256 cars was used for the opening of the Orange Line, which needed new cars when it opened in October 1993. The order was completed in 1994. The 3200-series contains many innovations over the previous 2600-series, including solid state computerized (microprocessor) control for much of the cab functions and traction system. Diagnostics are also easier to perform on this series than on previous series. In addition, fluted steel siding is included on these cars for the first time since the 2200-series, in order to reduce graffiti. The series also introduced openable hopper windows for use in case of air conditioner failure.