BSicon/Catalogue/branchings

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90° curves[edit]

  • As always, note that BSicons are normally named from the driver's perspective (i.e. the perspective of someone looking down the line from the front of the train), so a "right turn" icon from the viewer's perspective should look like a curve from the top of the icon to the left.
  • Other separate pairs can be made by overlaying their elements, or by using the junction icons (see BSicon/Catalogue/junctions).
  ex u uex
To right
STRr STRr exSTRr uSTRr uexSTRr
tSTRr tSTRr extSTRr utSTRr uextSTRr Tunnel
tSTRra tSTRra       Tunnel start
tSTRre tSTRre       Tunnel end
LSTRr LSTRr exLSTRr uLSTRr uexLSTRr Interruption
tLSTRr tLSTRr extLSTRr utLSTRr uextLSTRr Interruption, tunnel
hSTRr hSTRr exhSTRr uhSTRr uexhSTRr Elevated
hSTRra hSTRra exhSTRra uhSTRra uexhSTRra Elevated start
hSTRre hSTRre exhSTRre uhSTRre uexhSTRre Elevated end
hLSTRr     uhLSTRr uexhLSTRr Interruption, elevated
DSTRr DSTRr exDSTRr uDSTRr uexDSTRr Embankment
CSTRr CSTRr exCSTRr uCSTRr uexCSTRr Cutting
To left
STRl STRl exSTRl uSTRl uexSTRl
tSTRl tSTRl extSTRl utSTRl uextSTRl Tunnel
tSTRla tSTRla   utSTRla   Tunnel start
tSTRle tSTRle       Tunnel end
LSTRl LSTRl exLSTRl uLSTRl uexLSTRl Interruption
tLSTRl tLSTRl extLSTRl utLSTRl uextLSTRl Interruption, tunnel
hSTRl hSTRl exhSTRl uhSTRl uexhSTRl Elevated
hSTRla hSTRla exhSTRla uhSTRla uexhSTRla Elevated start
hSTRle hSTRle exhSTRle uhSTRle uexhSTRle Elevated end
hLSTRl     uhLSTRl uexhLSTRl Interruption, elevated
DSTRl DSTRl exDSTRl uDSTRl uexDSTRl Embankment
CSTRl CSTRl exCSTRl uCSTRl uexCSTRl Cutting
From right
STR+r STR+r exSTR+r uSTR+r uexSTR+r
tSTR+r tSTR+r extSTR+r utSTR+r uextSTR+r Tunnel
tSTR+ra tSTR+ra       Tunnel start
tSTR+re tSTR+re       Tunnel end
LSTR+r LSTR+r exLSTR+r uLSTR+r uexLSTR+r Interruption
tLSTR+r tLSTR+r extLSTR+r utLSTR+r uextLSTR+r Interruption, tunnel
hSTR+r hSTR+r exhSTR+r uhSTR+r uexhSTR+r Elevated
hSTR+ra hSTR+ra exhSTR+ra uhSTR+ra uexhSTR+ra Elevated start
hSTR+re hSTR+re exhSTR+re uhSTR+re uexhSTR+re Elevated end
hLSTR+r     uhLSTR+r uexhLSTR+r Interruption, elevated
DSTR+r DSTR+r exDSTR+r uDSTR+r uexDSTR+r Embankment
CSTR+r CSTR+r exCSTR+r uCSTR+r uexCSTR+r Cutting
From left
STR+l STR+l exSTR+l uSTR+l uexSTR+l
tSTR+l tSTR+l extSTR+l utSTR+l uextSTR+l Tunnel
tSTR+la tSTR+la       Tunnel start
tSTR+le tSTR+le       Tunnel end
LSTR+l LSTR+l exLSTR+l uLSTR+l uexLSTR+l Interruption
tLSTR+l tLSTR+l extLSTR+l utLSTR+l uextLSTR+l Interruption, tunnel
hSTR+l hSTR+l exhSTR+l uhSTR+l uexhSTR+l Elevated
hSTR+la hSTR+la exhSTR+la uhSTR+la uexhSTR+la Elevated start
hSTR+le hSTR+le exhSTR+le uhSTR+le uexhSTR+le Elevated end
hLSTR+l     uhLSTR+l uexhLSTR+l Interruption, elevated
DSTR+l DSTR+l exDSTR+l uDSTR+l uexDSTR+l Embankment
CSTR+l CSTR+l exCSTR+l uCSTR+l uexCSTR+l Cutting
  ex u uex

Two curves[edit]

  e x ex u ue ux uex
STRr+l STRr+l eSTRr+l xSTRr+l exSTRr+l uSTRr+l ueSTRr+l uxSTRr+l uexSTRr+l to right & from left
tSTRr+l tSTRr+l etSTRr+l xtSTRr+l extSTRr+l utSTRr+l uetSTRr+l uxtSTRr+l uextSTRr+l to right & from left in tunnel
mSTRr+l mSTRr+l emSTRr+l xmSTRr+l exmSTRr+l umSTRr+l uemSTRr+l uxmSTRr+l uexmSTRr+l to right & from left mixed
STRl+r STRl+r eSTRl+r xSTRl+r exSTRl+r uSTRl+r ueSTRl+r uxSTRl+r uexSTRl+r to left & from right
tSTRl+r tSTRl+r etSTRl+r xtSTRl+r extSTRl+r utSTRl+r uetSTRl+r uxtSTRl+r uextSTRl+r to left & from right in tunnel
mSTRl+r mSTRl+r emSTRl+r xmSTRl+r exmSTRl+r umSTRl+r uemSTRl+r uxmSTRl+r uexmSTRl+r to left & from right mixed
  e x ex u ue ux uex

45° curves (ÜW)[edit]

Examples
STR2\STRc3
STRc1\STR+4

STR2\STRc3
STRc1\STRl+4

ABZg2\CONT3!~ÜWu3
ABZg+1u\CONT4

Note: the kSTR icon set works better for large 90° curves:

ukSTR2\
ukSTRc1\ukSTRl+4

This category contains icons originally created for flying junctions (in German: Überwerfungsbauwerk), but can also be used for broad-radius curves and other configurations. All these icons connect at a corner with the line running at a 45° angle.

Curves[edit]

Basic curve icons use the STR root with suffixes.

  1. If the track comes from the top and goes to the bottom, no additional suffix is required.
    BSicon STR.svgSTR
  2. If the track comes from the top and goes to a position on the side, a single suffix to determine the direction is added.
    BSicon STRr.svg STRr
    to the right
    BSicon STR3.svg STR3
    to corner 3
    BSicon STR1.svg STR1
    to corner 1
  3. If the track comes from a position on the side and goes to the bottom,
    1. a "+" is added to indicate "coming from";
    2. a single suffix is added to indicate the origin.
    BSicon STR+r.svg STR+r
    from the right
    BSicon STR+3.svg STR+3
    from corner 3
    BSicon STR+1.svg STR+1
    from corner 1
  4. If the track comes from a position on the side and moves to another position on the side, we add
    1. a single suffix to indicate the "to" direction (this suffix must be the one closest to the bottom);
    2. a "+" to indicate "coming from";
    3. another suffix to indicate the origin.
    BSicon STRr+4.svgSTRr+4
    to the right from corner 4
    BSicon STRl+4.svgSTRl+4
    to the left from corner 4
    BSicon STR2+r.svgSTR2+r
    to corner 2 from the right
    BSicon STR2+4.svgSTR2+4
    to corner 2 from corner 4
    BSicon STR2+1.svgSTR2+1
    to corner 2 from corner 1
    BSicon STR2+l.svgSTR2+l
    to corner 2 from the left
    • Note that the + is omitted if the track starts and ends at the same "level" (i.e. top or bottom).
    • For lines running across from left to right or vice versa, the suffix "q" is added.
    BSicon STR14.svgSTR14
    corner 1 & corner 4
    BSicon STR23.svgSTR23
    corner 2 & corner 3
    BSicon STRq.svgSTRq
    left & right


Interruption[edit]

Examples
1
2
3
Connecting to a line
uSTRc2\gSTR3+1
gLSTR+1\uSTRc4
uLLSTRc2a\gSTR3+1
gLLSTR+1\uLLSTRc4a
uSTRc2\STR3+1
LLSTR+1\uSTRc4
4
5
Connecting to another interruption
uLLSTRc2\gLLSTR3
gLLSTR+1\uLLSTRc4
uSTRc2\LSTR3
LSTR+1\uSTRc4

There are two versions of 45° interruption (Lücke) curves:

  • The LSTR group have a straight line at the corner, and are designed to connect with a solid line with two regular STRc* corners (1).
  • The LLSTR group have a quarter of a dot at the corner, and are designed to connect with a solid line with LLSTRc*a/e corners (2), or with another interruption with two LLSTRc* corners (4).

In the examples to the right the green illustrates the correct configurations (1, 2, 4), and the red the incorrect (3, 5). (In all cases the corner icons are displayed in blue for visibility.)

Single curves[edit]

  ex u uex
Forward to corner 3
STR3 STR3 exSTR3 uSTR3 uexSTR3
tSTR3 tSTR3 extSTR3 utSTR3 uextSTR3 tunnel
tSTR3a tSTR3a extSTR3a utSTR3a uextSTR3a tunnel start
tSTR3a@f tSTR3a@f extSTR3a@f utSTR3a@f uextSTR3a@f tunnel start forward
tSTR3e tSTR3e extSTR3e utSTR3e uextSTR3e tunnel end
tSTR3e@f tSTR3e@f extSTR3e@f utSTR3e@f uextSTR3e@f tunnel end forward
hSTR3 hSTR3 exhSTR3 uhSTR3 uexhSTR3 elevated
hSTR3a hSTR3a exhSTR3a uhSTR3a uexhSTR3a elevated start
hSTR3e hSTR3e exhSTR3e uhSTR3e uexhSTR3e elevated end
htSTR3a htSTR3a exhtSTR3a uhtSTR3a uexhtSTR3a elevated to tunnel start
htSTR3e htSTR3e exhtSTR3e uhtSTR3e uexhtSTR3e elevated to tunnel end
LSTR3 LSTR3 exLSTR3 uLSTR3 uexLSTR3 interruption
LLSTR3 LLSTR3 exLLSTR3 uLLSTR3 uexLLSTR3 interruption (see note above)
tLSTR3 tLSTR3 extLSTR3 utLSTR3 uextLSTR3 interruption in tunnel
hLSTR3 hLSTR3 exhLSTR3 uhLSTR3 uexhLSTR3 interruption, elevated
Forward to corner 2
STR2 STR2 exSTR2 uSTR2 uexSTR2
tSTR2 tSTR2 extSTR2 utSTR2 uextSTR2 tunnel
tSTR2a tSTR2a extSTR2a utSTR2a uextSTR2a tunnel start
tSTR2a@f tSTR2a@f extSTR2a@f utSTR2a@f uextSTR2a@f tunnel start forward
tSTR2e tSTR2e extSTR2e utSTR2e uextSTR2e tunnel end
tSTR2e@f tSTR2e@f extSTR2e@f utSTR2e@f uextSTR2e@f tunnel end forward
hSTR2 hSTR2 exhSTR2 uhSTR2 uexhSTR2 elevated
hSTR2a hSTR2a exhSTR2a uhSTR2a uexhSTR2a elevated start
hSTR2e hSTR2e exhSTR2e uhSTR2e uexhSTR2e elevated end
htSTR2a htSTR2a exhtSTR2a uhtSTR2a uexhtSTR2a elevated to tunnel start
htSTR2e htSTR2e exhtSTR2e uhtSTR2e uexhtSTR2e elevated to tunnel end
LSTR2 LSTR2 exLSTR2 uLSTR2 uexLSTR2 interruption
LLSTR2 LLSTR2 exLLSTR2 uLLSTR2 uexLLSTR2 interruption (see note above)
tLSTR2 tLSTR2 extLSTR2 utLSTR2 uextLSTR2 interruption in tunnel
hLSTR2 hLSTR2 exhLSTR2 uhLSTR2 uexhLSTR2 interruption, elevated
Forward from corner 4
STR+4 STR+4 exSTR+4 uSTR+4 uexSTR+4
tSTR+4 tSTR+4 extSTR+4 utSTR+4 uextSTR+4 tunnel
tSTR+4a tSTR+4a extSTR+4a utSTR+4a uextSTR+4a tunnel start
tSTR+4a@g tSTR+4a@g extSTR+4a@g utSTR+4a@g uextSTR+4a@g tunnel start backward
tSTR+4e tSTR+4e extSTR+4e utSTR+4e uextSTR+4e tunnel end
tSTR+4e@g tSTR+4e@g extSTR+4e@g utSTR+4e@g uextSTR+4e@g tunnel end backward
hSTR+4 hSTR+4 exhSTR+4 uhSTR+4 uexhSTR+4 elevated
hSTR+4a hSTR+4a exhSTR+4a uhSTR+4a uexhSTR+4a elevated start
hSTR+4e hSTR+4e exhSTR+4e uhSTR+4e uexhSTR+4e elevated end
htSTR+4a htSTR+4a exhtSTR+4a uhtSTR+4a uexhtSTR+4a elevated to tunnel start
htSTR+4e htSTR+4e exhtSTR+4e uhtSTR+4e uexhtSTR+4e elevated to tunnel end
LSTR+4 LSTR+4 exLSTR+4 uLSTR+4 uexLSTR+4 interruption
LLSTR+4 LLSTR+4 exLLSTR+4 uLLSTR+4 uexLLSTR+4 interruption (see note above)
tLSTR+4 tLSTR+4 extLSTR+4 utLSTR+4 uextLSTR+4 interruption in tunnel
hLSTR+4 hLSTR+4 exhLSTR+4 uhLSTR+4 uexhLSTR+4 interruption, elevated
Forward from corner 1
STR+1 STR+1 exSTR+1 uSTR+1 uexSTR+1
tSTR+1 tSTR+1 extSTR+1 utSTR+1 uextSTR+1 tunnel
tSTR+1a tSTR+1a extSTR+1a utSTR+1a uextSTR+1a tunnel start
tSTR+1a@g tSTR+1a@g extSTR+1a@g utSTR+1a@g uextSTR+1a@g tunnel start backward
tSTR+1e tSTR+1e extSTR+1e utSTR+1e uextSTR+1e tunnel end
tSTR+1e@g tSTR+1e@g extSTR+1e@g utSTR+1e@g uextSTR+1e@g tunnel end backward
hSTR+1 hSTR+1 exhSTR+1 uhSTR+1 uexhSTR+1 elevated
hSTR+1a hSTR+1a exhSTR+1a uhSTR+1a uexhSTR+1a elevated start
hSTR+1e hSTR+1e exhSTR+1e uhSTR+1e uexhSTR+1e elevated end
htSTR+1a htSTR+1a exhtSTR+1a uhtSTR+1a uexhtSTR+1a elevated to tunnel start
htSTR+1e htSTR+1e exhtSTR+1e uhtSTR+1e uexhtSTR+1e elevated to tunnel end
LSTR+1 LSTR+1 exLSTR+1 uLSTR+1 uexLSTR+1 interruption
LLSTR+1 LLSTR+1 exLLSTR+1 uLLSTR+1 uexLLSTR+1 interruption (see note above)
tLSTR+1 tLSTR+1 extLSTR+1 utLSTR+1 uextLSTR+1 interruption in tunnel
hLSTR+1 hLSTR+1 exhLSTR+1 uhLSTR+1 uexhLSTR+1 interruption, elevated
From corner 1 to right
STRr+1 STRr+1 exSTRr+1 uSTRr+1 uexSTRr+1
tSTRr+1 tSTRr+1 extSTRr+1 utSTRr+1 uextSTRr+1 tunnel
tSTRr+1a tSTRr+1a extSTRr+1a utSTRr+1a uextSTRr+1a tunnel start
tSTRr+1a@g tSTRr+1a@g extSTRr+1a@g utSTRr+1a@g uextSTRr+1a@g tunnel start backward
tSTRr+1e tSTRr+1e extSTRr+1e utSTRr+1e uextSTRr+1e tunnel end
tSTRr+1e@g tSTRr+1e@g extSTRr+1e@g utSTRr+1e@g uextSTRr+1e@g tunnel end backward
hSTRr+1 hSTRr+1 exhSTRr+1 uhSTRr+1 uexhSTRr+1 elevated
LSTRr+1 LSTRr+1 exLSTRr+1 uLSTRr+1 uexLSTRr+1 interruption
LLSTRr+1 LLSTRr+1 exLLSTRr+1 uLLSTRr+1 uexLLSTRr+1 interruption (see note above)
From corner 4 to left
STRl+4 STRl+4 exSTRl+4 uSTRl+4 uexSTRl+4
tSTRl+4 tSTRl+4 extSTRl+4 utSTRl+4 uextSTRl+4 tunnel
tSTRl+4a tSTRl+4a extSTRl+4a utSTRl+4a uextSTRl+4a tunnel start
tSTRl+4a@g tSTRl+4a@g extSTRl+4a@g utSTRl+4a@g uextSTRl+4a@g tunnel start backward
tSTRl+4e tSTRl+4e extSTRl+4e utSTRl+4e uextSTRl+4e tunnel end
tSTRl+4e@g tSTRl+4e@g extSTRl+4e@g utSTRl+4e@g uextSTRl+4e@g tunnel end backward
hSTRl+4 hSTRl+4 exhSTRl+4 uhSTRl+4 uexhSTRl+4 elevated
LSTRl+4 LSTRl+4 exLSTRl+4 uLSTRl+4 uexLSTRl+4 interruption
LLSTRl+4 LLSTRl+4 exLLSTRl+4 uLLSTRl+4 uexLLSTRl+4 interruption (see note above)
To corner 2 from right
STR2+r STR2+r exSTR2+r uSTR2+r uexSTR2+r
tSTR2+r tSTR2+r extSTR2+r utSTR2+r uextSTR2+r tunnel
tSTR2+ra tSTR2+ra extSTR2+ra utSTR2+ra uextSTR2+ra tunnel start
tSTR2+ra@f tSTR2+ra@f extSTR2+ra@f utSTR2+ra@f uextSTR2+ra@f tunnel start forward
tSTR2+re tSTR2+re extSTR2+re utSTR2+re uextSTR2+re tunnel end
tSTR2+re@f tSTR2+re@f extSTR2+re@f utSTR2+re@f uextSTR2+re@f tunnel end forward
hSTR2+r hSTR2+r exhSTR2+r uhSTR2+r uexhSTR2+r elevated
LSTR2+r LSTR2+r exLSTR2+r uLSTR2+r uexLSTR2+r interruption
LLSTR2+r LLSTR2+r exLLSTR2+r uLLSTR2+r uexLLSTR2+r interruption (see note above)
To corner 3 from left
STR3+l STR3+l exSTR3+l uSTR3+l uexSTR3+l
tSTR3+l tSTR3+l extSTR3+l utSTR3+l uextSTR3+l tunnel
tSTR3+la tSTR3+la extSTR3+la utSTR3+la uextSTR3+la tunnel start
tSTR3+la@f tSTR3+la@f extSTR3+la@f utSTR3+la@f uextSTR3+la@f tunnel start forward
tSTR3+le tSTR3+le extSTR3+le utSTR3+le uextSTR3+le tunnel end
tSTR3+le@f tSTR3+le@f extSTR3+le@f utSTR3+le@f uextSTR3+le@f tunnel end forward
hSTR3+l hSTR3+l exhSTR3+l uhSTR3+l uexhSTR3+l elevated
LSTR3+l LSTR3+l exLSTR3+l uLSTR3+l uexLSTR3+l interruption
LLSTR3+l LLSTR3+l exLLSTR3+l uLLSTR3+l uexLLSTR3+l interruption (see note above)
Corner to corner (elevated icons use corners with matching formations)
STR3+4 STR3+4 exSTR3+4 uSTR3+4 uexSTR3+4 from corner 4 to corner 3
LSTR3+4 LSTR3+4 exLSTR3+4 uLSTR3+4 uexLSTR3+4 from corner 4 to corner 3 interruption
tSTR3+4 tSTR3+4 extSTR3+4 utSTR3+4 uextSTR3+4 from corner 4 to corner 3 tunnel
hSTR3+4 hSTR3+4 exhSTR3+4 uhSTR3+4 uexhSTR3+4 from corner 4 to corner 3 elevated
hSTR3+4~LL hSTR3+4~LL exhSTR3+4~LL uhSTR3+4~LL uexhSTR3+4~LL from corner 4 to corner 3 elevated; matching icon at side
hSTR3+4~FF hSTR3+4~FF exhSTR3+4~FF uhSTR3+4~FF uexhSTR3+4~FF from corner 4 to corner 3 elevated; matching icon at side
hSTR3+4~GG hSTR3+4~GG exhSTR3+4~GG uhSTR3+4~GG uexhSTR3+4~GG from corner 4 to corner 3 elevated; matching icon at side
STR2+1 STR2+1 exSTR2+1 uSTR2+1 uexSTR2+1 from corner 1 to corner 2
LSTR2+1 LSTR2+1 exLSTR2+1 uLSTR2+1 uexLSTR2+1 from corner 1 to corner 2 interruption
tSTR2+1 tSTR2+1 extSTR2+1 utSTR2+1 uextSTR2+1 from corner 1 to corner 2 tunnel
hSTR2+1 hSTR2+1 exhSTR2+1 uhSTR2+1 uexhSTR2+1 from corner 1 to corner 2 elevated
hSTR2+1~RR hSTR2+1~RR exhSTR2+1~RR uhSTR2+1~RR uexhSTR2+1~RR from corner 1 to corner 2 elevated; matching icon at side
hSTR2+1~FF hSTR2+1~FF exhSTR2+1~FF uhSTR2+1~FF uexhSTR2+1~FF from corner 1 to corner 2 elevated; matching icon at side
hSTR2+1~GG hSTR2+1~GG exhSTR2+1~GG uhSTR2+1~GG uexhSTR2+1~GG from corner 1 to corner 2 elevated; matching icon at side
STR14 STR14 exSTR14 uSTR14 uexSTR14 between corners 1 and 4
LSTR14 LSTR14 exLSTR14 uLSTR14 uexLSTR14 between corners 1 and 4 interruption
tSTR14 tSTR14 extSTR14 utSTR14 uextSTR14 between corners 1 and 4 tunnel
tSTR14ea     utSTR14ea uextSTR14ea between corners 1 and 4 tunnel end and start
hSTR14 hSTR14 exhSTR14 uhSTR14 uexhSTR14 between corners 1 and 4 elevated
hSTR14~FF hSTR14~FF exhSTR14~FF uhSTR14~FF uexhSTR14~FF between corners 1 and 4 elevated; matching icon at side
hSTR14~LL hSTR14~LL exhSTR14~LL uhSTR14~LL uexhSTR14~LL between corners 1 and 4 elevated; matching icon at side
hSTR14~RR hSTR14~RR exhSTR14~RR uhSTR14~RR uexhSTR14~RR between corners 1 and 4 elevated; matching icon at side
STR23 STR23 exSTR23 uSTR23 uexSTR23 between corners 2 and 3
LSTR23 LSTR23 exLSTR23 uLSTR23 uexLSTR23 between corners 2 and 3 interruption
tSTR23 tSTR23 extSTR23 utSTR23 uextSTR23 between corners 2 and 3 tunnel
hSTR23 hSTR23 exhSTR23 uhSTR23 uexhSTR23 between corners 2 and 3 elevated
hSTR23~GG hSTR23~GG exhSTR23~GG uhSTR23~GG uexhSTR23~GG between corners 2 and 3 elevated; matching icon at side
hSTR23~LL hSTR23~LL exhSTR23~LL uhSTR23~LL uexhSTR23~LL between corners 2 and 3 elevated; matching icon at side
hSTR23~RR hSTR23~RR exhSTR23~RR uhSTR23~RR uexhSTR23~RR between corners 2 and 3 elevated; matching icon at side
Tight curves
STR1 STR1 exSTR1 uSTR1 uexSTR1 Forward to corner 1
STRl+1 STRl+1 exSTRl+1 uSTRl+1 uexSTRl+1 To left from corner 1
STR2+l STR2+l exSTR2+l uSTR2+l uexSTR2+l To left from corner 2
STR+2 STR+2 exSTR+2 uSTR+2 uexSTR+2 Forward from corner 2
STR+3 STR+3 exSTR+3 uSTR+3 uexSTR+3 Forward from corner 3
STR3+r STR3+r exSTR3+r uSTR3+r uexSTR3+r To right from corner 3
STRr+4 STRr+4 exSTRr+4 uSTRr+4 uexSTRr+4 To right from corner 4
tSTRr+4     utSTRr+4 uextSTRr+4 To right from corner 4 tunnel
STR4 STR4 exSTR4 uSTR4 uexSTR4 Forward to corner 4
  ex u uex

Combinations[edit]

Mixed icons are not shown here for brevity. m is added before tSTR, hSTR or STR (e.g.   (mtSTR3u)).


  e x ex u ue ux uex
STR+c1 STR+c1 eSTR+c1 xSTR+c1 exSTR+c1 uSTR+c1 ueSTR+c1 uxSTR+c1 uexSTR+c1 Through + corner 1
STRq+c1 STRq+c1 eSTRq+c1 xSTRq+c1 exSTRq+c1 uSTRq+c1 ueSTRq+c1 uxSTRq+c1 uexSTRq+c1 Across + corner 1
tSTR+tc1 tSTR+tc1 etSTR+tc1 xtSTR+tc1 extSTR+tc1 utSTR+tc1 uetSTR+tc1 uxtSTR+tc1 uextSTR+tc1 Through + corner 1 both in tunnel
tSTRq+tc1 tSTRq+tc1 etSTRq+tc1 xtSTRq+tc1 extSTRq+tc1 utSTRq+tc1 uetSTRq+tc1 uxtSTRq+tc1 uextSTRq+tc1 Across + corner 1 both in tunnel
hSTR+hc1 hSTR+hc1 ehSTR+hc1 xhSTR+hc1 exhSTR+hc1 uhSTR+hc1 uehSTR+hc1 uxhSTR+hc1 uexhSTR+hc1 Through + corner 1 both elevated
hSTRq+hc1 hSTRq+hc1 ehSTRq+hc1 xhSTRq+hc1 exhSTRq+hc1 uhSTRq+hc1 uehSTRq+hc1 uxhSTRq+hc1 uexhSTRq+hc1 Across + corner 1 both elevated
STR+c2 STR+c2 eSTR+c2 xSTR+c2 exSTR+c2 uSTR+c2 ueSTR+c2 uxSTR+c2 uexSTR+c2 Through + corner 2
STRq+c2 STRq+c2 eSTRq+c2 xSTRq+c2 exSTRq+c2 uSTRq+c2 ueSTRq+c2 uxSTRq+c2 uexSTRq+c2 Across + corner 2
tSTR+tc2 tSTR+tc2 etSTR+tc2 xtSTR+tc2 extSTR+tc2 utSTR+tc2 uetSTR+tc2 uxtSTR+tc2 uextSTR+tc2 Through + corner 2 both in tunnel
tSTRq+tc2 tSTRq+tc2 etSTRq+tc2 xtSTRq+tc2 extSTRq+tc2 utSTRq+tc2 uetSTRq+tc2 uxtSTRq+tc2 uextSTRq+tc2 Across + corner 2 both in tunnel
hSTR+hc2 hSTR+hc2 ehSTR+hc2 xhSTR+hc2 exhSTR+hc2 uhSTR+hc2 uehSTR+hc2 uxhSTR+hc2 uexhSTR+hc2 Through + corner 2 both elevated
hSTRq+hc2 hSTRq+hc2 ehSTRq+hc2 xhSTRq+hc2 exhSTRq+hc2 uhSTRq+hc2 uehSTRq+hc2 uxhSTRq+hc2 uexhSTRq+hc2 Across + corner 2 both elevated
STR+c3 STR+c3 eSTR+c3 xSTR+c3 exSTR+c3 uSTR+c3 ueSTR+c3 uxSTR+c3 uexSTR+c3 Through + corner 3
STRq+c3 STRq+c3 eSTRq+c3 xSTRq+c3 exSTRq+c3 uSTRq+c3 ueSTRq+c3 uxSTRq+c3 uexSTRq+c3 Across + corner 3
tSTR+tc3 tSTR+tc3 etSTR+tc3 xtSTR+tc3 extSTR+tc3 utSTR+tc3 uetSTR+tc3 uxtSTR+tc3 uextSTR+tc3 Through + corner 3 both in tunnel
tSTRq+tc3 tSTRq+tc3 etSTRq+tc3 xtSTRq+tc3 extSTRq+tc3 utSTRq+tc3 uetSTRq+tc3 uxtSTRq+tc3 uextSTRq+tc3 Across + corner 3 both in tunnel
hSTR+hc3 hSTR+hc3 ehSTR+hc3 xhSTR+hc3 exhSTR+hc3 uhSTR+hc3 uehSTR+hc3 uxhSTR+hc3 uexhSTR+hc3 Through + corner 3 both elevated
hSTRq+hc3 hSTRq+hc3 ehSTRq+hc3 xhSTRq+hc3 exhSTRq+hc3 uhSTRq+hc3 uehSTRq+hc3 uxhSTRq+hc3 uexhSTRq+hc3 Across + corner 3 both elevated
STR+c4 STR+c4 eSTR+c4 xSTR+c4 exSTR+c4 uSTR+c4 ueSTR+c4 uxSTR+c4 uexSTR+c4 Through + corner 4
STRq+c4 STRq+c4 eSTRq+c4 xSTRq+c4 exSTRq+c4 uSTRq+c4 ueSTRq+c4 uxSTRq+c4 uexSTRq+c4 Across + corner 4
tSTR+tc4 tSTR+tc4 etSTR+tc4 xtSTR+tc4 extSTR+tc4 utSTR+tc4 uetSTR+tc4 uxtSTR+tc4 uextSTR+tc4 Through + corner 4 both in tunnel
tSTRq+tc4 tSTRq+tc4 etSTRq+tc4 xtSTRq+tc4 extSTRq+tc4 utSTRq+tc4 uetSTRq+tc4 uxtSTRq+tc4 uextSTRq+tc4 Across + corner 4 both in tunnel
hSTR+hc4 hSTR+hc4 ehSTR+hc4 xhSTR+hc4 exhSTR+hc4 uhSTR+hc4 uehSTR+hc4 uxhSTR+hc4 uexhSTR+hc4 Through + corner 4 both elevated
hSTRq+hc4 hSTRq+hc4 ehSTRq+hc4 xhSTRq+hc4 exhSTRq+hc4 uhSTRq+hc4 uehSTRq+hc4 uxhSTRq+hc4 uexhSTRq+hc4 Across + corner 4 both elevated
STR+c12 STR+c12 eSTR+c12 xSTR+c12 exSTR+c12 uSTR+c12 ueSTR+c12 uxSTR+c12 uexSTR+c12 Through + corners 1 and 2
STRq+c12 STRq+c12 eSTRq+c12 xSTRq+c12 exSTRq+c12 uSTRq+c12 ueSTRq+c12 uxSTRq+c12 uexSTRq+c12 Across + corners 1 and 2
tSTR+tc12 tSTR+tc12 etSTR+tc12 xtSTR+tc12 extSTR+tc12 utSTR+tc12 uetSTR+tc12 uxtSTR+tc12 uextSTR+tc12 Through + corners 1 and 2 all in tunnel
tSTRq+tc12 tSTRq+tc12 etSTRq+tc12 xtSTRq+tc12 extSTRq+tc12 utSTRq+tc12 uetSTRq+tc12 uxtSTRq+tc12 uextSTRq+tc12 Across + corners 1 and 2 all in tunnel
hSTR+hc12         uhSTR+hc12       Through + corners 1 and 2 all elevated
hSTRq+hc12                 Across + corners 1 and 2 all elevated
STR+c34 STR+c34 eSTR+c34 xSTR+c34 exSTR+c34 uSTR+c34 ueSTR+c34 uxSTR+c34 uexSTR+c34 Through + corners 3 and 4
STRq+c34 STRq+c34 eSTRq+c34 xSTRq+c34 exSTRq+c34 uSTRq+c34 ueSTRq+c34 uxSTRq+c34 uexSTRq+c34 Across + corners 3 and 4
tSTR+tc34 tSTR+tc34 etSTR+tc34 xtSTR+tc34 extSTR+tc34 utSTR+tc34 uetSTR+tc34 uxtSTR+tc34 uextSTR+tc34 Through + corners 3 and 4 all in tunnel
tSTRq+tc34 tSTRq+tc34 etSTRq+tc34 xtSTRq+tc34 extSTRq+tc34 utSTRq+tc34 uetSTRq+tc34 uxtSTRq+tc34 uextSTRq+tc34 Across + corners 3 and 4 all in tunnel
hSTR+hc34                 Through + corners 3 and 4 all elevated
hSTRq+hc34                 Across + corners 3 and 4 all elevated
STR+c14 STR+c14 eSTR+c14 xSTR+c14 exSTR+c14 uSTR+c14 ueSTR+c14 uxSTR+c14 uexSTR+c14 Through + corners 1 and 4
STRq+c14 STRq+c14 eSTRq+c14 xSTRq+c14 exSTRq+c14 uSTRq+c14 ueSTRq+c14 uxSTRq+c14 uexSTRq+c14 Across + corners 1 and 4
tSTR+tc14 tSTR+tc14 etSTR+tc14 xtSTR+tc14 extSTR+tc14 utSTR+tc14 uetSTR+tc14 uxtSTR+tc14 uextSTR+tc14 Through + corners 1 and 4 all in tunnel
tSTRq+tc14 tSTRq+tc14 etSTRq+tc14 xtSTRq+tc14 extSTRq+tc14 utSTRq+tc14 uetSTRq+tc14 uxtSTRq+tc14 uextSTRq+tc14 Across + corners 1 and 4 all in tunnel
hSTR+hc14                 Through + corners 1 and 4 all elevated
hSTRq+hc14                 Across + corners 1 and 4 all elevated
STR+c23 STR+c23 eSTR+c23 xSTR+c23 exSTR+c23 uSTR+c23 ueSTR+c23 uxSTR+c23 uexSTR+c23 Through + corners 2 and 3
STRq+c23 STRq+c23 eSTRq+c23 xSTRq+c23 exSTRq+c23 uSTRq+c23 ueSTRq+c23 uxSTRq+c23 uexSTRq+c23 Across + corners 2 and 3
tSTR+tc23 tSTR+tc23 etSTR+tc23 xtSTR+tc23 extSTR+tc23 utSTR+tc23 uetSTR+tc23 uxtSTR+tc23 uextSTR+tc23 Through + corners 2 and 3 all in tunnel
tSTRq+tc23 tSTRq+tc23 etSTRq+tc23 xtSTRq+tc23 extSTRq+tc23 utSTRq+tc23 uetSTRq+tc23 uxtSTRq+tc23 uextSTRq+tc23 Across + corners 2 and 3 all in tunnel
hSTR+hc23                 Through + corners 2 and 3 all elevated
hSTRq+hc23                 Across + corners 2 and 3 all elevated
STR+c13 STR+c13 eSTR+c13 xSTR+c13 exSTR+c13 uSTR+c13 ueSTR+c13 uxSTR+c13 uexSTR+c13 Through + corners 1 and 3
STRq+c13 STRq+c13 eSTRq+c13 xSTRq+c13 exSTRq+c13 uSTRq+c13 ueSTRq+c13 uxSTRq+c13 uexSTRq+c13 Across + corners 1 and 3
tSTR+tc13 tSTR+tc13 etSTR+tc13 xtSTR+tc13 extSTR+tc13 utSTR+tc13 uetSTR+tc13 uxtSTR+tc13 uextSTR+tc13 Through + corners 1 and 3 all in tunnel
tSTRq+tc13 tSTRq+tc13 etSTRq+tc13 xtSTRq+tc13 extSTRq+tc13 utSTRq+tc13 uetSTRq+tc13 uxtSTRq+tc13 uextSTRq+tc13 Across + corners 1 and 3 all in tunnel
hSTR+hc13                 Through + corners 1 and 3 all elevated
hSTRq+hc13                 Across + corners 1 and 3 all elevated
STR+c24 STR+c24 eSTR+c24 xSTR+c24 exSTR+c24 uSTR+c24 ueSTR+c24 uxSTR+c24 uexSTR+c24 Through + corners 2 and 4
STRq+c24 STRq+c24 eSTRq+c24 xSTRq+c24 exSTRq+c24 uSTRq+c24 ueSTRq+c24 uxSTRq+c24 uexSTRq+c24 Across + corners 2 and 4
tSTR+tc24 tSTR+tc24 etSTR+tc24 xtSTR+tc24 extSTR+tc24 utSTR+tc24 uetSTR+tc24 uxtSTR+tc24 uextSTR+tc24 Through + corners 2 and 4 all in tunnel
tSTRq+tc24 tSTRq+tc24 etSTRq+tc24 xtSTRq+tc24 extSTRq+tc24 utSTRq+tc24 uetSTRq+tc24 uxtSTRq+tc24 uextSTRq+tc24 Across + corners 2 and 4 all in tunnel
hSTR+hc24                 Through + corners 2 and 4 all elevated
hSTRq+hc24                 Across + corners 2 and 4 all elevated
STR3u STR3u eSTR3u xSTR3u exSTR3u uSTR3u ueSTR3u uxSTR3u uexSTR3u Forward to corner 3 under
tSTR3u tSTR3u etSTR3u xtSTR3u extSTR3u utSTR3u uetSTR3u uxtSTR3u uextSTR3u Forward to corner 3 in tunnel, under
tSTR3ut tSTR3ut etSTR3ut xtSTR3ut extSTR3ut utSTR3ut uetSTR3ut uxtSTR3ut uextSTR3ut Forward to corner 3 in tunnel, under tunnel
tSTR3ua tSTR3ua etSTR3ua xtSTR3ua extSTR3ua utSTR3ua uetSTR3ua uxtSTR3ua uextSTR3ua Forward to corner 3 tunnel start, under
STR3uh STR3uh eSTR3uh xSTR3uh exSTR3uh uSTR3uh ueSTR3uh uxSTR3uh uexSTR3uh Forward to corner 3 under elevated
hSTR3uh hSTR3uh ehSTR3uh xhSTR3uh exhSTR3uh uhSTR3uh uehSTR3uh uxhSTR3uh uexhSTR3uh Forward to corner 3 elevated, under elevated
STR3+c2 STR3+c2 eSTR3+c2 xSTR3+c2 exSTR3+c2         Forward to corner 3 + corner 2
STR2u STR2u eSTR2u xSTR2u exSTR2u uSTR2u ueSTR2u uxSTR2u uexSTR2u Forward to corner 2 under
tSTR2u tSTR2u etSTR2u xtSTR2u extSTR2u utSTR2u uetSTR2u uxtSTR2u uextSTR2u Forward to corner 2 in tunnel, under
tSTR2ut tSTR2ut etSTR2ut xtSTR2ut extSTR2ut utSTR2ut uetSTR2ut uxtSTR2ut uextSTR2ut Forward to corner 2 in tunnel, under tunnel
tSTR2ua tSTR2ua etSTR2ua xtSTR2ua extSTR2ua utSTR2ua uetSTR2ua uxtSTR2ua uextSTR2ua Forward to corner 2 tunnel start, under
STR2uh STR2uh eSTR2uh xSTR2uh exSTR2uh uSTR2uh ueSTR2uh uxSTR2uh uexSTR2uh Forward to corner 2 under elevated
hSTR2uh hSTR2uh ehSTR2uh xhSTR2uh exhSTR2uh uhSTR2uh uehSTR2uh uxhSTR2uh uexhSTR2uh Forward to corner 2 elevated, under elevated
STR2+c3 STR2+c3 eSTR2+c3 xSTR2+c3 exSTR2+c3         Forward to corner 2 + corner 3
STR+4u STR+4u eSTR+4u xSTR+4u exSTR+4u uSTR+4u ueSTR+4u uxSTR+4u uexSTR+4u Forward from corner 4 under
tSTR+4u tSTR+4u etSTR+4u xtSTR+4u extSTR+4u utSTR+4u uetSTR+4u uxtSTR+4u uextSTR+4u Forward from corner 4 in tunnel, under
tSTR+4ut tSTR+4ut etSTR+4ut xtSTR+4ut extSTR+4ut utSTR+4ut uetSTR+4ut uxtSTR+4ut uextSTR+4ut Forward from corner 4 in tunnel, under tunnel
tSTR+4ue tSTR+4ue etSTR+4ue xtSTR+4ue extSTR+4ue utSTR+4ue uetSTR+4ue uxtSTR+4ue uextSTR+4ue Forward from corner 4 tunnel end, under
STR+4uh STR+4uh eSTR+4uh xSTR+4uh exSTR+4uh uSTR+4uh ueSTR+4uh uxSTR+4uh uexSTR+4uh Forward from corner 4 under elevated
hSTR+4uh hSTR+4uh ehSTR+4uh xhSTR+4uh exhSTR+4uh uhSTR+4uh uehSTR+4uh uxhSTR+4uh uexhSTR+4uh Forward from corner 4 elevated, under elevated
STR+4+c1 STR+4+c1 eSTR+4+c1 xSTR+4+c1 exSTR+4+c1         Forward from corner 4 + corner 1
STR+1u STR+1u eSTR+1u xSTR+1u exSTR+1u uSTR+1u ueSTR+1u uxSTR+1u uexSTR+1u Forward from corner 1 under
tSTR+1u tSTR+1u etSTR+1u xtSTR+1u extSTR+1u utSTR+1u uetSTR+1u uxtSTR+1u uextSTR+1u Forward from corner 1 in tunnel, under
tSTR+1ut tSTR+1ut etSTR+1ut xtSTR+1ut extSTR+1ut utSTR+1ut uetSTR+1ut uxtSTR+1ut uextSTR+1ut Forward from corner 1 in tunnel, under tunnel
tSTR+1ue tSTR+1ue etSTR+1ue xtSTR+1ue extSTR+1ue utSTR+1ue uetSTR+1ue uxtSTR+1ue uextSTR+1ue Forward from corner 1 tunnel end, under
STR+1uh STR+1uh eSTR+1uh xSTR+1uh exSTR+1uh uSTR+1uh ueSTR+1uh uxSTR+1uh uexSTR+1uh Forward from corner 1 under elevated
hSTR+1uh hSTR+1uh ehSTR+1uh xhSTR+1uh exhSTR+1uh uhSTR+1uh uehSTR+1uh uxhSTR+1uh uexhSTR+1uh Forward from corner 1 elevated, under elevated
STR+1+c4 STR+1+c4 eSTR+1+c4 xSTR+1+c4 exSTR+1+c4         Forward from corner 1 + corner 4
STR3u+l STR3u+l eSTR3u+l xSTR3u+l exSTR3u+l uSTR3u+l ueSTR3u+l uxSTR3u+l uexSTR3u+l To corner 3 from left under
tSTR3u+l tSTR3u+l etSTR3u+l xtSTR3u+l extSTR3u+l utSTR3u+l uetSTR3u+l uxtSTR3u+l uextSTR3u+l To corner 3 from left in tunnel, under
tSTR3ut+l tSTR3ut+l etSTR3ut+l xtSTR3ut+l extSTR3ut+l utSTR3ut+l uetSTR3ut+l uxtSTR3ut+l uextSTR3ut+l To corner 3 from left in tunnel, under tunnel
tSTR3u+la tSTR3u+la etSTR3u+la xtSTR3u+la extSTR3u+la utSTR3u+la uetSTR3u+la uxtSTR3u+la uextSTR3u+la To corner 3 from left tunnel start, under
STR3uh+l STR3uh+l eSTR3uh+l xSTR3uh+l exSTR3uh+l uSTR3uh+l ueSTR3uh+l uxSTR3uh+l uexSTR3uh+l To corner 3 from left under elevated
hSTR3uh+l hSTR3uh+l ehSTR3uh+l xhSTR3uh+l exhSTR3uh+l uhSTR3uh+l uehSTR3uh+l uxhSTR3uh+l uexhSTR3uh+l To corner 3 from left elevated, under elevated
STR2u+r STR2u+r eSTR2u+r xSTR2u+r exSTR2u+r uSTR2u+r ueSTR2u+r uxSTR2u+r uexSTR2u+r To corner 2 from right under
tSTR2u+r tSTR2u+r etSTR2u+r xtSTR2u+r extSTR2u+r utSTR2u+r uetSTR2u+r uxtSTR2u+r uextSTR2u+r To corner 2 from right in tunnel, under
tSTR2ut+r tSTR2ut+r etSTR2ut+r xtSTR2ut+r extSTR2ut+r utSTR2ut+r uetSTR2ut+r uxtSTR2ut+r uextSTR2ut+r To corner 2 from right in tunnel, under tunnel
tSTR2u+ra tSTR2u+ra etSTR2u+ra xtSTR2u+ra extSTR2u+ra utSTR2u+ra uetSTR2u+ra uxtSTR2u+ra uextSTR2u+ra To corner 2 from right tunnel start, under
STR2uh+r STR2uh+r eSTR2uh+r xSTR2uh+r exSTR2uh+r uSTR2uh+r ueSTR2uh+r uxSTR2uh+r uexSTR2uh+r To corner 2 from right under elevated
hSTR2uh+r hSTR2uh+r ehSTR2uh+r xhSTR2uh+r exhSTR2uh+r uhSTR2uh+r uehSTR2uh+r uxhSTR2uh+r uexhSTR2uh+r To corner 2 from right elevated, under elevated
STRr+1u STRr+1u eSTRr+1u xSTRr+1u exSTRr+1u uSTRr+1u ueSTRr+1u uxSTRr+1u uexSTRr+1u From corner 1 to right under
tSTRr+1u tSTRr+1u etSTRr+1u xtSTRr+1u extSTRr+1u utSTRr+1u uetSTRr+1u uxtSTRr+1u uextSTRr+1u From corner 1 to right in tunnel, under
tSTRr+1ut tSTRr+1ut etSTRr+1ut xtSTRr+1ut extSTRr+1ut utSTRr+1ut uetSTRr+1ut uxtSTRr+1ut uextSTRr+1ut From corner 1 to right in tunnel, under tunnel
tSTRr+1ue tSTRr+1ue etSTRr+1ue xtSTRr+1ue extSTRr+1ue utSTRr+1ue uetSTRr+1ue uxtSTRr+1ue uextSTRr+1ue From corner 1 to right tunnel end, under
STRr+1uh STRr+1uh eSTRr+1uh xSTRr+1uh exSTRr+1uh uSTRr+1uh ueSTRr+1uh uxSTRr+1uh uexSTRr+1uh From corner 1 to right under elevated
hSTRr+1uh hSTRr+1uh ehSTRr+1uh xhSTRr+1uh exhSTRr+1uh uhSTRr+1uh uehSTRr+1uh uxhSTRr+1uh uexhSTRr+1uh From corner 1 to right elevated, under elevated
STRl+4u STRl+4u eSTRl+4u xSTRl+4u exSTRl+4u uSTRl+4u ueSTRl+4u uxSTRl+4u uexSTRl+4u From corner 4 to left under
tSTRl+4u tSTRl+4u etSTRl+4u xtSTRl+4u extSTRl+4u utSTRl+4u uetSTRl+4u uxtSTRl+4u uextSTRl+4u From corner 4 to left in tunnel, under
tSTRl+4ut tSTRl+4ut etSTRl+4ut xtSTRl+4ut extSTRl+4ut utSTRl+4ut uetSTRl+4ut uxtSTRl+4ut uextSTRl+4ut From corner 4 to left in tunnel, under tunnel
tSTRl+4ue tSTRl+4ue etSTRl+4ue xtSTRl+4ue extSTRl+4ue utSTRl+4ue uetSTRl+4ue uxtSTRl+4ue uextSTRl+4ue From corner 4 to left tunnel end, under
STRl+4uh STRl+4uh eSTRl+4uh xSTRl+4uh exSTRl+4uh uSTRl+4uh ueSTRl+4uh uxSTRl+4uh uexSTRl+4uh From corner 4 to left under elevated
hSTRl+4uh hSTRl+4uh ehSTRl+4uh xhSTRl+4uh exhSTRl+4uh uhSTRl+4uh uehSTRl+4uh uxhSTRl+4uh uexhSTRl+4uh From corner 4 to left elevated, under elevated
  e x ex u ue ux uex

Corners[edit]

ex u uex
STRc1 ex u uex Upper-right corner
tSTRc1 ex u uex Upper-right corner tunnel
hSTRc1 ex u uex Upper-right corner elevated
LLSTRc1 ex u uex Upper-right corner interruption
LLSTRc1a ex u uex Upper-right corner interruption start
LLSTRc1e ex u uex Upper-right corner interruption end
STRc2 ex u uex Lower-right corner
tSTRc2 ex u uex Lower-right corner tunnel
hSTRc2 ex u uex Lower-right corner elevated
LLSTRc2 ex u uex Lower-right corner interruption
LLSTRc2a ex u uex Lower-right corner interruption start
LLSTRc2e ex u uex Lower-right corner interruption end
STRc3 ex u uex Lower-left corner
tSTRc3 ex u uex Lower-left corner tunnel
hSTRc3 ex u uex Lower-left corner elevated
LLSTRc3 ex u uex Lower-left corner interruption
LLSTRc3a ex u uex Lower-left corner interruption start
LLSTRc3e ex u uex Lower-left corner interruption end
STRc4 ex u uex Upper-left corner
tSTRc4 ex u uex Upper-left corner tunnel
hSTRc4 ex u uex Upper-left corner elevated
LLSTRc4 ex u uex Upper-left corner interruption
LLSTRc4a ex u uex Upper-left corner interruption start
LLSTRc4e ex u uex Upper-left corner interruption end
STRc12 ex u uex Upper- & lower-right corners
tSTRc12 ex u uex Upper- & lower-right corners tunnel
STRc23 ex u uex Lower-left & -right corners
tSTRc23 ex u uex Lower-left & -right corners tunnel
STRc34 ex u uex Upper- & lower-left corners
tSTRc34 ex u