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7000-series (CTA)

Rapid transit rail car for Chicago

  • 5 min read
  • 2 chapters

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Through Alternating current

The contract called for ten prototypes to be delivered by October 2019. If the rail cars proved to be acceptable, then full production cars would be delivered starting in October 2020, at a rate of 10 cars per month. The cost per car is approximately $1.58 million. Prototypes for testing were delivered in August 2020, and the base order is to be delivered by 2027.

According to the CTA, when the 7000-series cars fully rollout and are in service, the Chicago "L" will have one of the youngest fleets of any U.S. transit system, with its fleet being an average of 13 years old. For comparison, the average age of rapid transit trains will be 27 years in Boston, 25 years in the District of Columbia, 22 years in New York City, and 18 years in San Francisco. Ten cars in the 7000-series began testing revenue service on April 21, 2021.

Features

Each 7000-series rail car features 37 to 38 seats, and is a hybrid of the 3200-series and 5000-series. The 7000-series train cars are equipped with AC propulsion; interior security cameras, interior readouts, interior GPS maps, glow-in-the-dark evacuation signs, operator-controlled ventilation systems. AC propulsion allows for smoother acceleration, lower operational costs, less wear and tear, and greater energy efficiency. In particular, AC propulsion can take advantage of regenerative braking, meaning the train returns excess energy to the third rail as it slows down. An improved suspension system offers passengers a smoother ride. LED screens give real-time transit information to passengers. LCD screens, installed near the doors, display real-time surveillance footage of riders in order to deter crime.

In the 7000-series, the design and arrangement of seats were modified to improve ergonomics and increase leg room. In addition, because the seats are attached to the side of the train using a diagonal pole rather than a vertical one to the floor, cleaning the train will be easier. However, seats are still a combination of fabric and plastic. Compared to the 5000-series, there are more front and back-facing seats. Enhanced air conditioning circulates air more efficiently during hot summer days. Laser sensors above the doors counts the number of passengers, allowing the CTA to track passenger volumes and change its schedules accordingly. Door sensors also help the trains adjust to the heights of station platforms.

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