Editing Delta Line Project (section)

==History==
The line opened in February 2021 with automated three-car 1100 Series as the sole train type. This train could carry about 50-100 passengers although the server capacity was set to 25. Set 1103/1145/1126 became the main workhorse of the line with power car 1105 as backup until May 2021, when a revamp was conducted. Other trains were also used and could be found on display in the Delta Line Museum. Due to lag, only one train set could operate a time, resulting in poor frequency for players. A branch line called Angle Shuttle was also opened, which has one 9700 Series train set. As of now, the Delta line uses slightly revamped 1300 Series trains (a refurbished version of the 12xx) for regular service.

In May 2021, the original Delta Line trains were temporarily replaced by real life MTR trains from Hong Kong during the HK week event. During the event, Metro Cammell EMUs. Kinki Sharyo/Kawasaki SP1900s also entered service on the line. Unlike the relatively stable original trains, these special trains were prone to glitches and were often recorded derailing easily. After the event, the 1100 Series trains were replaced by the 1200 Series, which is a slightly modified version.

Some time later, Delta Line loaned some train sets to The Ryan Railroad, as to celebrate 1 million passengers on the Roblox Star Line.

In August 2021, an interior shot of a Japanese-style next stop system was teased over the Roblox Multiplayer Calling, Hong Kong Facebook group for a new train set. On August 25, 2021, Cloud Workshop, the line's developer announced that an Airport line would be opened. The update in late August 2021 also added more train types and lines, which were now custom built compared on various train models. A LRT line was added between Brentwood West and Brentwood North Depot, using an automated people mover (APM) based on a Bombardier Innovia-100 APM. Trains were also equipped with a click to sit feature.

This update further added an overarching authority over the system known as Delta Region Transit, responsible for both rail and bus operations. However, the new lines have been shut down temporarily until their trains are stable and work properly.

An admin train based on the Metro Cammell M-Train can also be spawned by admins, although it is not driverless.

In 2023, the Angle Line was renamed the Central Line, being extended to connect with the Airport Line and the rest of the system. A new line, the Harbour Line also began service, using the 61xx Series sets. Unlike the trains used on the Delta and Central lines, despite operating automatically, the 61xx EMUs have driver's cabs, although they are not accessible to passengers. This implied that these services once required drivers to operate the trains. Further innovations included real time tracking of heavy rail trains, which show where each set is near stations and real time arrival displays at all stations.