Launch Planner
LOC: +37.7749° N, -122.4194° W | DATUM: WGS84
CAD Studio Engine v3.4 Active

Precision Map-Based Road & Interchange Design

Draft smooth multi-tier highway alignments, compute live curve curvature, and model complex interchange splines with instant vector mathematics and CAD-grade precision.

DESIGN RADIUSMETRIC
R=185m
GRADIENT SLOPETOLERANCE
+3.8%
VERTICAL ELEVATIONDATUM
+14.5m
SURFACE LANESSTANDARD
4-LANE DUAL
Launch Road PlannerExplore Tool Specs
Continuous Bézier Splines
Live Superelevation Calc
DXF / GeoJSON Export
100%
Entry (R=450m)
Apex (R=185m)
Spline (R=320m)
Terminal (R=∞ (Straight))
ACTIVE VERTEXV2
Apex Transition P1
POS_X: 230mPOS_Y: 130mSLOPE: +3.8%Z-DATUM: +14.5m
Click control vertices to inspect mathematical curvature nodes.
Bézier Curve ActiveSpline Points: 4/4
Projection: Lambert ConformalSTATUS: GEOMETRY VALID
Civil Infrastructure Modules

Core Engineering Capabilities

High-precision CAD-grade tools designed specifically for roadway drafting, interchange modeling, and parametric alignment verification.

MOD-01 // SPLINEContinuous Tangent
R_MIN: 450m | T: G2
Smooth Expressway Splines
Multi-point parametric Bézier alignments with automated continuous curvature transitions and live tangent control handles.
  • Real-time G2 continuous curve computation
  • Dynamic deflection angle constraint checking
  • Automated spiral easement & transition curves
  • Interactive vertex coordinate snapping
MOD-02 // JUNCTIONGrade Separation
Z_CLEAR: 5.50m | 3-TIER
Multi-Tier Interchange Design
Comprehensive geometric templates for cloverleaf, trumpet, stack, and directional diamond interchanges with vertical clearances.
  • Automated overpass & underpass vertical offsets
  • Ramp loop speed-taper geometry calculations
  • Directional connector alignment validation
  • Multi-level conflict point collision detection
MOD-03 // PROFILEParametric Lane
W_TOTAL: 36.4m | 8-LANE
Cross-Section Customization
Modular roadway profile assembly with configurable multi-lane widths, median barriers, clear zones, and dynamic superelevation slopes.
  • Customizable lane width & median geometry
  • Automated superelevation runoff calculation
  • Shoulder, ditch, and side slope cross-falls
  • Pavement layer & barrier barrier modeling
MOD-04 // METRICSCAD Calipers
ACC: 0.001m | G_MAX: 4.0%
Precision Geometry & Grade
Direct numeric vertex manipulation, station-by-station chainage, grade slope readouts, and integrated distance measuring calipers.
  • Sub-millimeter station chainage tracking
  • Longitudinal slope & vertical curve profiles
  • Direct coordinate & radius numeric input
  • Full export to DXF, LandXML, and GeoJSON

Ready to draft complex road systems?

All geometry calculations run client-side in real time with continuous precision validation.

View All SpecsLaunch Road Planner
SYSTEM ARCHITECTURE // SPEC 04

Map-Based Design Workflow

A continuous engineering pipeline built for civil road planners, moving from georeferenced coordinate grids to high-precision vector production.

EXPLORE ALL MODULESSTART DRAFTING
PHASE // 01GEODETIC BASE
Coordinate Grid Registration
Align your project area with orthographic map tiles, projected CRS coordinates, and elevation contour benchmarks.
PRECISION±0.001 m
PHASE // 02ALIGNMENT DRAFTING
Bézier Spline Path Plotting
Draft smooth road centerlines with live tangent vectors, curvature radius constraints, and automatic transition curves.
CONTINUITYG2 SMOOTH
PHASE // 03STRUCTURAL GEOMETRY
Cross-Section & Lane Profiling
Configure multi-lane cross sections, medians, shoulder runouts, superelevation banking, and drainage channel widths.
BANKING4.5% SLOPE
PHASE // 04GRADE SEPARATION
Interchange & Junction Modeling
Generate multi-level cloverleafs, directional ramps, and slip lanes with dynamic clearance checking and merge tapers.
RAMP TAPER1:25 RATIO
PHASE // 05PHYSICS & COMPLIANCE
Real-Time Telemetry & Validation
Run live engineering checks for sight distances, maximum grade thresholds, turning envelopes, and vehicle clearance.
SIGHT DIST185 m @ 100km/h
PHASE // 06PROJECT DELIVERY
Multi-Format Vector Export
Package road centerlines, surface polygons, and elevation profiles into DXF, LandXML, GeoJSON, and SVG vector sets.
OUTPUT LAYERS12 VECTORS
STAGE_INSPECTOR // 02
STATUS: ACTIVE
V_02 [X:142.8 Y:92.1]R=450m
LAYER:02_ALIGNMENT_SPLINE
SCALE 1:2000
ACTIVE STAGE SUMMARY

Bézier Spline Path Plotting

Draft smooth road centerlines with live tangent vectors, curvature radius constraints, and automatic transition curves.

BUFFER KEYCURVE_RADIUS
READOUT VALUEG2 SMOOTH
SYSTEM METRICS // TELEMETRYR_MIN = 450.0 m | CLOTHOID A = 180

ALL 6 WORKFLOW PHASES OPERATE NON-DESTRUCTIVELY IN BROWSER MEMORY.

REQUEST CUSTOM SPECS
Engine Telemetry & Precision

Built for sub-millimeter road geometry and high-speed visualization.

Expressway/Road Maker combines high-precision mathematical curve solvers with an interactive map canvas, delivering instant rendering and accurate CAD exports.

CALCULATED
Geometric Precision
0.001mm tolerance

Sub-millimeter parametric spline curves and multi-vertex alignment calculations.

Bézier G3 Continuity98%
OPTIMIZED
Engine Ingestion
< 42ms latency

Instantaneous project loading for large-scale multi-tier interchange models.

100k+ Control Nodes94%
STABLE
Junction Render Rate
120FPS target

Smooth 60-120 FPS rasterization with dynamic cloverleaf elevation calculations.

WebGL 2.0 Canvas100%
COMPLIANT
CAD Interoperability
100%Lossless conversion

Zero-drift export to standard civil engineering formats: DXF, GeoJSON, and SVG.

DXF · SVG · GeoJSON96%

ACTIVE PIPELINE SPECIFICATION

v2.4 Core

Deterministic coordinate arithmetic guaranteed across all browsers and devices.

COORDINATE_GRIDEPSG:3857 (WGS 84 / Pseudo-Mercator)
GEOMETRY_KERNELNon-Uniform Rational B-Spline (NURBS)
ELEVATION_PROFILESContinuous Grade & Super-Elevation Analysis
EXPORT_PRECISIONDouble-precision 64-bit IEEE 754 float
View Engine Specs
EXPRESSWAY DRAFTING ENGINE // CORE v4.8
STATION ACTIVE
Interactive Map Canvas|Vector Precision

Start Planning Expressways and Complex Interchanges

Draw smooth highway alignments, configure multi-lane profiles, calculate precise grade elevations, and export CAD files with mathematical accuracy. Launch the browser-based studio right now.

Launch Road Planner StudioImport Existing ProjectExplore Technical Specs
Multi-lane Support Infinite Canvas Zoom Direct .DXF / .SVG GIS Alignment

Spline Geometry Engine

Draft multi-tier interchanges, adaptive superelevations, and cloverleafs with continuous curvature Bézier controls.

Instant CAD Export

Generate precision layered vector blueprints, grade slope measurements, and vector coordinate meshes instantly.

Cloud Project Vault

Collaboratively save, load, and inspect infrastructure networks with zero data loss or coordinate drifting.

PRECISION TOLERANCE
0.001 mmOPTIMAL
ENGINE LATENCY
< 12 msLIVE SYNC
EXPORT COMPATIBILITY
DXF · SVG · GeoJSONREADY
COORDINATE SYSTEM
WGS84 / UTM PROJLOCKED
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