Repost:
There are these 4 services A - D
A and D are Dual depot controlled
B and C are single depot controlled. All depots are different
D was dual depot, then single, then dual again.
A starts its journey from interchange E and meets B at Road F,
underneath a viaduct.
Both will travel together until they reach a junction. A will
proceed straight to Jln G while B will turn into street H. Both
services will not meet again, though they ply the same road(Road
I).
B will carry on on Street H, and meet C at Road J near an MRT
station. Both services will travel together till they reach Road I
junction, where B will turn into Road I and proceed to its
terminating point.
A, after seperating with B, travels at Jln G, meets D at Road I,
but different stops. Both Services will travel and meet C at Street
K, near a national/historic monument. All 3 will travel together
all the way till they reach C and D's terminating point. After
sending C and D home, A will proceed to its terminating
point.
What are services A, B, C and D, interchange E, Roads F, I, and J,
Jln G, and Streets H and K?
Hint please.
The heartland sector of this question is in the east? Or
west?