Daikoku PA: lift mainline over the apron, rebuild both ramps
The PA ring road and the expressway mainline were both at ground level, so the ring parapet stood INSIDE the carriageway (measured -10.0 studs of vertical overlap: a wall in the middle of the road). Reference photos of the real Daikoku Futo PA show the expressway flying OVER the parking apron on pillars, with the PA at ground level and ramps climbing up to meet it. Rebuilt to match: - mainline lifted 38 studs through the junction, eased in/out (max 5.26% grade, within real expressway limits) - PA ring + apron stay at ground level; legacy PARingPillar props removed - both on/off ramps regraded over the full rise with smoothstep easing, segments overlapped 3 studs so wheels can't catch a seam, plus support pillars and edge kerbs where the deck is high Verified in-engine against built parts (tools/diag_daikoku.luau), not just source: clearance now +28.0 studs, both ramps continuous (max step 5.62, no gaps). tools/plot_daikoku.py renders the plan/section for comparison.
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--[[
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verify_rwd.luau -- verify the RWD steering fix, bypassing the require cache.
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check_live_source proved the pushed source IS in the DataModel (40307
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bytes, RWD marker present, single copy). But diag_steering still saw
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4 motors because require() caches per module INSTANCE for the life of the
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Play session, and CarManager was first required before the push -- so the
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old build closure was still running.
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Clone() produces a NEW instance, so require(clone) re-executes the current
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source. That gives a true read of the fix without restarting Play mode.
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]]
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local ServerScriptService = game:GetService("ServerScriptService")
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local ReplicatedStorage = game:GetService("ReplicatedStorage")
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local RunService = game:GetService("RunService")
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local out = {}
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local function log(...)
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local parts = {}
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for i = 1, select("#", ...) do
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parts[#parts + 1] = tostring((select(i, ...)))
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end
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table.insert(out, table.concat(parts, " "))
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end
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local Shared = ReplicatedStorage:FindFirstChild("Shared")
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local Cars = require(Shared.Cars)
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local Chassis = require(Shared.Chassis)
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local orig = ServerScriptService:FindFirstChild("Server", true):FindFirstChild("CarManager")
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local clone = orig:Clone()
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clone.Parent = orig.Parent
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local CarManager = require(clone)
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log("required a FRESH clone of CarManager (" .. #clone.Source .. " bytes)")
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local pad = Instance.new("Part")
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pad.Size = Vector3.new(6000, 8, 6000)
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pad.Position = Vector3.new(0, 5000, 0)
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pad.Anchored = true
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pad.Material = Enum.Material.Concrete
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pad.Parent = workspace
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local padTop = pad.Position.Y + 4
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local car = Cars.Get("gtr_r34")
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local tuning = Chassis.tuningFor(car)
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local model = CarManager._buildForDiag(car, tuning)
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model.Parent = workspace
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model:PivotTo(CFrame.new(0, padTop + 3, 0))
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local servos, motors = {}, {}
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for _, d in ipairs(model:GetDescendants()) do
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if d:IsA("HingeConstraint") then
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if d.Name == Chassis.STEER_SERVO_NAME then
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table.insert(servos, d)
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elseif d.Name == Chassis.WHEEL_MOTOR_NAME then
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table.insert(motors, d)
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end
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end
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end
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local motorCorners = {}
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for _, mo in ipairs(motors) do
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table.insert(motorCorners, mo.Parent and mo.Parent.Name or "?")
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end
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log(string.format("servos %d | motors %d [%s]", #servos, #motors, table.concat(motorCorners, ", ")))
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log(
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string.format(
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"expected: 2 servos, 2 motors on REAR corners only -> %s",
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(#motors == 2 and #servos == 2) and "OK" or "WRONG"
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)
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)
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log("")
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local body = model.PrimaryPart
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for _ = 1, 90 do
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RunService.Heartbeat:Wait()
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end
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-- Drive the rears and hold a steady steer angle, exactly like diag_steering.
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local TARGET = -14
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local wheelR = Chassis.WHEEL_RADIUS
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local topW = tuning.MaxWheelAngularVelocity
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log("t(s) speed yawRate targetAng curAng radius")
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local samples = 0
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local errSum, errMax = 0, 0
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local startLook = body.CFrame.LookVector
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for step = 1, 300 do
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for _, mo in ipairs(motors) do
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mo.MotorMaxTorque = tuning.MotorMaxTorque
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mo.AngularVelocity = -topW
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end
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for _, s in ipairs(servos) do
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s.TargetAngle = TARGET
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end
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if step % 30 == 0 then
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local speed = body.AssemblyLinearVelocity.Magnitude
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local yaw = body.AssemblyAngularVelocity.Y
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local cur = servos[1].CurrentAngle
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local radius = (math.abs(yaw) > 1e-4) and (speed / math.abs(yaw)) or math.huge
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log(string.format("%4.1f %6.1f %7.3f %8.1f %8.1f %9.1f", step / 60, speed, yaw, TARGET, cur, radius))
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samples += 1
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local e = math.abs(cur - TARGET)
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errSum += e
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errMax = math.max(errMax, e)
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end
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RunService.Heartbeat:Wait()
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end
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local finalLook = body.CFrame.LookVector
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local heading = math.deg(math.acos(math.clamp(startLook:Dot(finalLook), -1, 1)))
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log("")
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log(string.format("SERVO tracking: mean err %.2f deg, max %.2f deg", errSum / samples, errMax))
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log(string.format("heading change over run: %.1f deg", heading))
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local speed = body.AssemblyLinearVelocity.Magnitude
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local yaw = math.abs(body.AssemblyAngularVelocity.Y)
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local actualR = (yaw > 1e-4) and (speed / yaw) or math.huge
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local wheelbase = Chassis.WHEELBASE or 11.8
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local ackR = wheelbase / math.tan(math.rad(math.abs(servos[1].CurrentAngle)))
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log(
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string.format(
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"Ackermann radius at %.1f deg = %.1f | ACTUAL %.1f | understeer %.2fx",
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servos[1].CurrentAngle,
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ackR,
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actualR,
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actualR / ackR
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)
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)
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model:Destroy()
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pad:Destroy()
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clone:Destroy()
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return table.concat(out, "\n")
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