diff --git a/src/server/MapBuilder.luau b/src/server/MapBuilder.luau
index b51885c..dae346e 100644
--- a/src/server/MapBuilder.luau
+++ b/src/server/MapBuilder.luau
@@ -1528,21 +1528,41 @@ local function buildPA(map: Folder)
 						kerb.Parent = pa
 					end
 
-					-- Red/white shoulder chevrons. Every Shuto ramp carries
-					-- these on the outside of the curve -- they read as speed
-					-- cues in the onboard footage and are the main thing that
-					-- makes a helix legible from inside the car. Alternating
-					-- segments only, so they stripe rather than smear.
-					if s % 2 == 0 then
+					-- Red/white chevron delineators.
+					--
+					-- CORRECTED 2026-08-03 against 4K dusk onboard footage of
+					-- the junction (jct_tsubasa_dusk, t=110..140s). These are
+					-- NOT road-surface paint, which is what the first pass
+					-- built -- a flat red slab lying on the deck. In reality
+					-- they are VERTICAL PANELS bolted to the outside face of
+					-- the concrete barrier, alternating red and white, running
+					-- continuously along the outside of the curve. They are
+					-- the main thing that makes a helix legible from inside
+					-- the car, and on the deck they were nearly invisible.
+					--
+					-- Roblox part granularity can't do a diagonal stripe
+					-- inside one panel, so alternating whole panels per
+					-- segment stands in for the diagonal hatching.
+					--
+					-- Outward side of the curve. Taking the raw radial
+					-- (segMid - O) as the offset direction is WRONG on the
+					-- straight tangent tail: there the radial is no longer
+					-- perpendicular to travel, so panels skew along the road
+					-- (measured: up to 33 studs of along-travel error over the
+					-- last ~9 segments, walking the panel line diagonally
+					-- across the deck instead of tracking its edge).
+					--
+					-- Offset along the true perpendicular `rightV` always, and
+					-- use the radial ONLY to choose which side is outboard.
+					local radial = Vector3.new(segMid.X - O.X, 0, segMid.Z - O.Z)
+					if radial.Magnitude > 0.01 and rightV.Magnitude > 0.01 then
+						local sgn = (rightV:Dot(radial.Unit) >= 0) and 1 or -1
+						local face = segMid + rightV * (sgn * RING_W / 2)
 						local chev = part({
 							Name = "PARampChevron",
-							Size = Vector3.new(2.2, 0.4, segLen * 0.55),
-							CFrame = CFrame.lookAt(
-								segMid + rightV * (turn * RING_W / 2 * 0.86),
-								segMid + rightV * (turn * RING_W / 2 * 0.86) + (b - a).Unit,
-								UP
-							) * CFrame.new(0, 1.3, 0),
-							Color = Color3.fromRGB(198, 46, 40),
+							Size = Vector3.new(0.5, 2.0, segLen),
+							CFrame = CFrame.lookAt(face, face + (b - a).Unit, UP) * CFrame.new(0, 2.7, 0),
+							Color = (s % 2 == 0) and Color3.fromRGB(198, 46, 40) or Color3.fromRGB(240, 238, 232),
 							Material = Enum.Material.SmoothPlastic,
 						})
 						chev.Parent = pa