Launch Planner
CORE PHILOSOPHY & ARCHITECTURE

CAD-Grade Engineering. Zero Software Friction.

Traditional civil road drafting forces a compromise between heavyweight desktop CAD packages and lightweight sketch tools that lack mathematical rigor. Expressway/Road Maker bridges this gap with an uncompromising, map-native geometry engine built directly for modern web browsers.

MODULE 01GEOMETRIC ENGINE
Instant Browser-Based Vector Operations
Real-time 60fps calculation of complex multi-tier Bézier splines without desktop CAD software bloat or backend rendering lag.
TELEMETRY STREAMSTATUS: LOCKED
RADIUS
R = 450.00m
GRADIENT
Grade: +2.14%
PARAM
Design: 110 km/h
Mathematical Base
C(t) = (1-t)³P₀ + 3(1-t)²tP₁ + 3(1-t)t²P₂ + t³P₃
  • Continuous C2 Curvature
  • Multi-segment Tangents
  • < 4ms Latency
MODULE 02SPATIAL ALIGNMENT
High-Precision Map Overlays & Coordinates
Sub-millimeter snapping directly on georeferenced satellite layers with continuous spherical coordinate reprojection.
TELEMETRY STREAMSTATUS: LOCKED
RADIUS
Lat: 37.7749° N
GRADIENT
Lon: 122.4194° W
PARAM
Grid: 0.05m EPSG
Mathematical Base
x = R · (λ – λ₀) · cos(φ₁), y = R · (φ – φ₀)
  • WGS84 / EPSG:4326 Support
  • true-Scale Reticle Snapping
  • Elevation Buffering
MODULE 03CIVIL CALCULATIONS
Mathematically Sound Superelevation & Clothoids
Automatic transition spiral computation conforming to AASHTO guidelines to prevent lateral acceleration spikes across interchanges.
TELEMETRY STREAMSTATUS: LOCKED
RADIUS
Spiral A = 180m
GRADIENT
e = +6.00% Max
PARAM
Comfort: ≤0.15g
Mathematical Base
A² = R · L | e_max = V² / (127 · R) – f_s
  • Clothoid Euler Spirals
  • Superelevation Runoff (e)
  • Sight Distance Checks
Vector Processing
60 FPS

GPU-accelerated spline rasterization

Snapping Accuracy
±0.001 m

true coordinate geometric precision

Interchange Types
12+ Modes

Cloverleaf, Trumpet, Stack, Roundabout

Export Standard
DXF / GeoJSON

Universal CAD & GIS interoperability

Ready to explore the planning workflow?

Design custom expressway interchanges and measure road geometry in real time.

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ENGINE ARCHITECTURE ROADMAP

Development Milestones

A chronological record of our core CAD engine innovations, from early spline geometry solvers to full-precision GIS road topology pipelines.

v0.4.0-COREQ2 2023ARCHIVED

Continuous Bézier Spline Engine

Sub-millimeter road curvature calculation

Engineered the initial multi-point Bézier parametric curve solver. Enabled dynamic tangent handle manipulation with real-time curvature continuity (G2) enforcement across complex road segments.

CAD_VIEWPORT // SPLINE
1:1 PRECISION
Curvature Error
< 0.002 mm
Spline Sampling
128 pts/seg
Compute Latency
0.4 ms
v1.2.0-SOLVQ4 2023STABLE

Multi-Tier Cloverleaf Solver

Automated grade separation & slip lanes

Integrated automated topological ramp generation for full and partial cloverleaf junctions. Introduced vertical clearance collision detection and automatic slope-to-elevation banking.

CAD_VIEWPORT // INTERCHANGE
1:1 PRECISION
Max Grade Limit
8.50 %
Tier Resolution
4-Level 3D
Auto-Ramp Time
1.2 ms
v2.0.0-PROJQ2 2024STABLE

GIS Coordinate Projection Engine

WGS84 & Web Mercator native alignment

Connected CAD geometry directly to global geodesic coordinates. Real-time satellite tile rectification allows civil road centerlines to snap directly against real-world terrain and elevation contours.

CAD_VIEWPORT // GIS
1:1 PRECISION
CRS Formats
EPSG:3857/4326
Tile Parallax
0.00 px
Contour Pitch
1.0 m grid
v2.8.0-LIVECURRENTACTIVE ENGINE

Multi-Format Vector CAD Pipeline

Direct export to DXF, SVG, and GeoJSON

Implemented a high-throughput vector serialization engine. Allows immediate export of road centerlines, curb buffers, lane markings, and junction polygon topologies without precision loss.

CAD_VIEWPORT // EXPORT
1:1 PRECISION
CAD Standard
AutoCAD DXF R12+
Geometry Precision
64-bit IEEE 754
Export Speed
18,000 seg/sec
Continuous CAD Innovation

Ready to construct accurate expressway geometries?

Explore our complete tool suite or get in touch for custom coordinate integrations.

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SYSTEM ONLINEMAP CANVAS DRAFTING READY

Command Station

Interactive map-based civil road planning and vector CAD drafting environment. Formulate complex highway geometry, multi-level junctions, and accurate gradient splines with complete spatial certainty.

1234 Infrastructure Ave, Planning City
Coordinate Standard: WGS84 / Spherical Mercator

Capabilities

Navigation

CAD Telemetry

KERNELv2.4.8-CAD
PRECISION0.001mm
SPLINE BUFFERREADY
© 2026 Expressway/Road Maker. All civil geometry data rights reserved.
Standard Verification Compliant