Welcome, Lol, i'm introducing to you the INTERNATIONAL EXPRESS
LINE.
Connecting from Harbourvale Central Interchange to Singapore
Changi Airport.
The distacne will be 230km and there would be stopovers at
Harbourvale Immigration Checkpoint and Changi Airport Immigration
Checkpoint.
The ride will be 30 minutes long with awesome scenery all along
the route. The route will go underground from Changi Airport
Immigration Checkpoint.
A train would be developed and hit speeds up to 350km/h. Routes
is at its first stage and to show you the proof ;
The crossovers after leaving Harbourvale Central
Interchange.

The depot will be located beside Harbourvale Immigration
Checkpoint. As a safety measure, all stations will have Platform
doors.
Wa siao. How come got 4 tracks one? Maybe try my suggestion, all
stations before and after it got a crippled / scissors. So that 0
disruption is expected.