The U1 serves 6 stations between Camden and Blue Mountain, with transfers available to the H4, T2, T3, T6, and U4 lines. It was the first AT line to be constructed, with the section from Forest Bay to Savanna Hill opening in early May 2025, and at that point was named "Line 1" instead of U1.
The U1 originally used 2 carriages of A1A stock. It was upgraded to use 4 carriages of B1 stock sometime after the U4 opened, which neccessitated the extension of the Forest Bay and Savanna Hill platforms.
The U1 primarily uses 120 speed track.
The U2 serves 5 stations between Linkurk and Scarborough, with transfers available to the H1, H4, T1, and U4 lines. It was constructed after H-4 construction was complete, though only to Ingram; the extension to Scarborough was built along with the H1 in December 2025.
Scarborough Fair Boulevard (H1, U2)
Freedom Terminal (H1, H4, T1, U2)
The U2, from opening, has always used 3 carriages of A2 stock, and is the only line to currently use A2 stock.
The U2 primarily uses 120 speed track.
The U4 serves 4 stations between Calumet City and Camden, with transfers available to the H1, T8, U1, and U2 lines. It was the most recently constructed metro line in the city, and has never been extended.
The U4 has always used 4 carriages of B1 stock, and was the first line to do so.
The U4 primarily uses 100 speed track.
The U3, originally known as Line A, was uniquely not constructed by qrid but rather by CharWorld. It served 3 stations between Black Forest and Port Sammy, and had transfers available to the H4, T2, T3, T7, and H4 lines. The line was decommissioned when the T6 was extended to Port Sammy, though the U3 platform at Black Forest was abandoned.
The U3 originally used 2 carriages of A1B stock, but was switched to A1A stock soon after.
The U3 had the fastest track on any Metro line, with 160 speed track. When the U3 was replaced by the T6, this track was swapped to 100 speed.
2026 JRSC
