Denver plans to add 26 new cars to the airport's underground train system, which connects the terminal to three concourses.
The Denver Post reports the city council approved a nearly $79 million purchase contract Monday with Bombardier Transportation in order to keep up with the growing passenger traffic at the Denver International Airport.
Airport officials say the new train cars will likely be delivered in 2020. The current 31-car fleet is expected to increase by 10 after 16 aging cars are replaced.
The city signed a $162 million operations and maintenance contract with Bombardier in 2017 to keep the train system running.
The airport began renovating the terminal and adding gates to concourses this year under an expansion project.