These are the first CTA railcars to have interior LED signs that display information such as the date, time, and the next station on the train's route.

[5] Vertical stanchions and horizontal overhead bars with straps have been added throughout much of the car to give standing passengers more to hold on to.

[6] New amenities include seven security cameras per car, new electronic signs making announcements visually, and "active" system maps showing the location of the train on the line.

The 5000-series use technologies such as AC traction equipment[2] that will enhance operations and maintenance and provide a smoother, more comfortable ride.

One of the requirements the CTA had during the bidding process was that manufacturers provide more than one interior layout for a hybrid seating configuration (both longitudinal and lateral), to minimize discomfort as well as maximize passenger flow.

[13] On November 16, 2023, car 5599, in service on the Yellow line, was approaching Howard station, when it hit snow removal equipment with 38 people onboard.