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Disable PA on/off ramps; restore mainline to pre-ramp state

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Three iterations of the Daikoku PA ramps never read as a real
interchange. Measured why, rather than tuning further:

  * the entry and exit decks INTERSECTED -- 2547 sample pairs within
    30 studs horizontally at <12 studs dY, worst case 0.5 studs apart
    at dY=0.0. On screen that is the bowtie tangle of white rails.
  * both real Daikoku ramps turn the SAME way (clockwise; the guide
    video says "right, right"). This build mirrored them into each
    other.
  * the real arc wraps OUTSIDE the lot and forms its north/east
    boundary. This build cut across the apron interior.

Gated behind BUILD_PA_RAMPS=false rather than deleted -- the radius
was already correct (470 studs vs an OSM-measured mean of 469) and
the merge lands tangent at 0.1-0.2 deg divergence. Both worth keeping.

Also removed two leftovers that would have outlived the ramps:

  * rampOpen punched holes in the mainline's outer parapet, railing
    and kill wall for ramps that no longer exist -- a barrier gap with
    a drop behind it. Sealed via RAMP_EDGE_OPENINGS=false. Verified:
    Barrier/EdgeRail/KillWall = 1646 each = 823 samples x 2 edges,
    0 road samples without a guard within 90 studs.
  * gore zebra hatching painted 1024 bars + 64 boundary lines marking
    a junction that is not there. Sealed via RAMP_GORE_MARKINGS=false.

Verified after a cache-busting fresh rebuild (Studio's require() cache
otherwise serves the previous map and reports a false pass):
  parts 22628 -> 15988
  all ramp part classes = 0
  Road = 823 (unchanged), spawn pad + PASpawn intact
  clip probe TRUSTWORTHY (control +11/-0), CLIPPING=0

Research and rebuild spec kept for when this is revisited:
reference/ramps/BUILD_SPEC.md, INDEX.md (10 CC-licensed Commons
photos), docs/daikoku-reference-spec.md (OSM circle fits).
This commit is contained in:
jesse
2026-08-03 21:15:25 -04:00
parent 1d23c187ad
commit c297b20aed
34 changed files with 2206 additions and 46 deletions
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reference/ramps/INDEX.md
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# PA Ramp Reference Images
Downloaded 2026-08-03. All files verified present on disk and integrity-checked
with PIL (12/12 valid, 0 corrupt).
## Wikimedia Commons (fetched by research agent)
| File | Px | Shows | License |
|---|---|---|---|
| `Daikoku-PA.JPG` | 2487x1797 | Daikoku PA overview | CC BY 3.0 |
| `Daikoku-JCT.JPG` | 2560x1920 | Daikoku JCT elevated stack | CC BY 3.0 |
| `DaikokuJCT-Bnishi.JPG` | 640x480 | Daikoku JCT bayside west | CC BY-SA 3.0 |
| `Shutoko_daikokuPA.jpg` | 1280x960 | Daikoku PA elevated structure | CC BY-SA 3.0 |
| `Shutoko_oiPA_east.jpg` | 1280x960 | Oi PA east | CC BY-SA 3.0 |
| `Shutoko_oiPA_west.jpg` | 1280x960 | Oi PA west (ground level, facility bldg) | CC BY-SA 3.0 |
| `Shutoko_heiwajimaPA_up.jpg` | 1280x960 | Heiwajima PA inbound | CC BY-SA 3.0 |
| `Shutoko_heiwajimaPA_down.jpg` | 1280x960 | Heiwajima PA outbound | CC BY-SA 3.0 |
| `Shutoko_shibauraPA.jpg` | 1280x960 | Shibaura PA | CC BY-SA 3.0 |
| `Shuto_expressway_shibaura_pa.jpg` | 1000x680 | Shibaura PA / expressway | CC BY-SA 3.0 |
License note: all CC BY / CC BY-SA. Reference-only for shape study. Do NOT
trace directly into shipped assets without attribution (see
`reference-image-research` skill, license matrix).
## From project NAS archive (higher value for geometry)
| File | Px | Shows |
|---|---|---|
| `aerial/daikoku_z19.jpg` | Esri z19 | **Best plan view.** Satellite of Daikoku PA: single large-radius arc wrapping the lot |
| `aerial/daikoku_bldg_big.jpg` | | Daikoku facility building aerial |
| `daikoku_jct_sheet2.jpg` | 1728x972 | Onboard contact sheet, Daikoku JCT |
| `exit_to_baybridge_sheet2.jpg` | 1728x1296 | **Best ground view.** Off-ramp divergence, gore hatching, jersey+mesh edge, box girder |
## Measured source of truth
`docs/daikoku-reference-spec.md` — OSM Overpass geometry with Kasa circle fits
of the actual ramp ways. This is measured, not estimated, and outranks generic
standards for Daikoku-specific radii.