ST - Stations

 (ST14 red) just like  (MetroSPB01 ST)
 (sST14 red) just like  (MetroSPB01 STs)
 (ST23 red) just like  (MetroSPB01 bST)
 (sST23 red) like bST, but not in service

CO - Crossover

 (COl14 red)
 (COr14 red) just like  (MetroSPB01 OB)
 (COlr14 red)
 (COl23 red)
 (COr23 red)
 (COlr23 red) just like  (MetroSPB01 uzCROSS)

TT - Turn tracks

 (dTT1-14 red) just like  (MetroSPB01 dOB1)
 (dTT2-14 red) just like  (MetroSPB01 dOB2)
 (uTT1-14 red) just like  (MetroSPB01 uOB1)
 (uTT2-14 red) just like  (MetroSPB01 uOB2)
 (dTT1-23 red) all the same, but with narrowed tracks at turn track beginning (at the end you'll need a SP)
 (dTT2-23 red)
 (uTT1-23 red)
 (uTT2-23 red)

YA - Yards

 (uYA23 red) similar to  (MetroSPB01 uDEPO), but with another design
 (dYA23 red) the same, but in the other direction
 (uYA14 red) both the same, but with wide tracks
 (dYA14 red)

TR - (straight) Tracks

These are all 15 possible combinations. I don't think that we need them all.
Simplified: | means track, . means no track.
  (TR1) |...
  (TR2) .|..
  (TR3) ..|.
  (TR4) ...|
  (TR12) ||..
  (TR13) |.|.
 (TR14 red) |..| imho important
 (TR23 red) .||. imho important
  (TR24) .|.|
  (TR34) ..||
  (TR234) .|||
  (TR134) |.||
  (TR124) ||.|
  (TR123) |||.
 (TR1234 red) |||| imho important

SP - spread tracks

Theoretically 54 possible combinations (without any switches!). With switches: 210 in total, 156 more!
 (SP23-14 red) just like  (MetroSPB01 spTRACK)
 (SP14-23 red) the same, but inverted

Imho we could need this 16 tracks with switches:
  (SP23-1234 red)
  (SP1234-23 red)
  (SP14-1234 red)
  (SP1234-14 red)
  (SP23-123 red)
  (SP23-234 red)
  (SP123-23 red)
  (SP234-23 red)
  (SP14-123 red)
  (SP14-234 red)
  (SP123-14 red)
  (SP234-14 red)
  (SP234-1234 red)
  (SP123-1234 red)
  (SP1234-123 red)
  (SP1234-234 red)