Online Highway Engineering & Civil 3D Automation Tools
Browser-based calculations, data conversion, and drawing submission tools for infrastructure professionals. Tools implementing selected ERA 2013, AASHTO, and other documented highway design criteria.
Engineered for Civil & Transportation Practitioners
InfraDigital CAD eliminates repetitive calculations, format mismatches, and manual spreadsheet errors in highway infrastructure projects. Designed specifically for highway design engineers, CAD technicians, geotechnical specialists, survey crews, and quantity surveyors.
Highway Design Engineers
Verify horizontal and vertical geometry, calculate superelevation transition stations, compute sight distances, and evaluate roadside barrier warrants in seconds.
CAD & BIM Technicians
Restructure raw Civil 3D LandXML alignment strings, format profile bands, and generate standard drawing submittal folder hierarchies effortlessly.
Survey & Quantity Teams
Detect point cloud coordinate inversions, run mass-haul cut-fill earthwork balance computations, and standardize itemized Bill of Quantities schedules.
20 Infrastructure Engineering Tools
Horizontal Alignment Formatter
Converts raw Civil 3D horizontal curve exports into standardized PC-PI-PT sequence tables with curve parameter validation.
Vertical Alignment Formatter
Validates vertical profile grades, checks minimum K-values for crest/sag curves, and restructures profile points.
Superelevation Calculator
Calculates standard transition runoff and runout lengths, cross-slope rates, and transition stations for highway curves.
Sight Distance Calculator
Calculates Stopping Sight Distance (SSD) and Passing Sight Distance (PSD) accounting for vehicle speed, perception-reaction time, and longitudinal grade.
Junction & Roundabout Geometric Checker
Audits entry deflection angles, inscribed circle diameters (ICD), circulatory roadway widths, and sight triangles against safety criteria.
Flexible Pavement Structural Sizer
Determines structural layer thicknesses (Surfacing, Base, Subbase) using subgrade CBR classes and cumulative ESAL traffic classes.
Rigid Pavement Slab Sizer
Calculates required concrete slab thickness, dowel bar sizing, and tie bar spacing using Westergaard stress equations and AASHTO rigid equations.
Pavement Layer Substitution Calculator
Computes structural layer equivalencies based on AASHTO structural layer coefficients (a1, a2, a3) to swap or optimize layer thicknesses.
Culvert & Side Ditch Sizer
Sizes pipe/box culverts and trapezoidal side ditches using Rational Method peak discharge Q and Manning's uniform open-channel flow equation.
Structure Plan-Profile Sheet Creator
Creates structured engineering data sheets for cross-drainage culvert structures, invert levels, skew angles, and headwall coordinates.
Survey Data Cleaner & Anomaly Detector
Cleans raw total station and GNSS point files (P,E,N,Z,D), identifies duplicate coordinates, inverted elevations, and code inconsistencies.
Terrain & Topography Classifier
Classifies longitudinal profile segments into Flat, Rolling, Mountainous, or Escarpment terrain per five-kilometer slope gradient thresholds.
Expansive Soil Classifier
Identifies and classifies high-swelling active clay soils using Plasticity Index (PI), Liquid Limit (LL), and Clay Fraction indicators.
Mass Haul Diagram & Balance Calculator
Computes algebraic cumulative mass-haul ordinates, identifies economic balance points, and evaluates cut-fill borrow/spoil requirements.
Earthwork Quantity Takeoff Assistant
Processes end-area cross-section tabular outputs into cumulative cut/fill volumes applying shrinkage and bulking compaction factors.
Guardrail & Barrier Warrant Evaluator
Evaluates embankment height, side slope severity, and roadside obstacle hazard offset to determine barrier warrants.
Road Signs & Markings Estimator
Calculates regulatory, warning, and informational sign requirements and thermoplastic pavement marking quantities per linear kilometer.
Bill of Quantities (BoQ) Standardizer
Formats and validates civil infrastructure itemized rate breakdowns across standard Division Series (1000 through 7000).
LandXML Centerline Geometry Formatter
Validates and reformats LandXML 1.2 alignment definitions into clean geometric coordinate strings compatible with Civil 3D and external survey software.
Standardized Drawing Submission Generator
Builds standardized directory hierarchies for drawing submittals (Concept, Preliminary, Detailed Design) and exports immediate ZIP packages.
How InfraDigital CAD Operates
A secure, deterministic 3-step pipeline designed to maintain professional data sovereignty.
1. Input or Import
Upload LandXML, CSV, or coordinate files, or enter roadway design variables directly. All files remain in your local browser memory without server uploads.
2. Compute & Audit
Deterministic algorithms execute formula checks against ERA 2013 and AASHTO criteria. Geometry, thicknesses, and drainage hydraulics are computed with full mathematical transparency.
3. Export Clean Outputs
Download formatted CSV tables for Civil 3D, export comprehensive PDF calculation briefs, or copy standardized XML for immediate integration into your CAD models.
Standards & Mathematical Methodologies
Our algorithms reference recognized engineering codes, providing verifiable engineering assumptions rather than opaque black-box estimates.
Geometric Design Manual (Table 2-1 terrain gradients, Table 9-3 K-values), Flexible Pavement Design Manual (CBR subgrade classifications and traffic classes T1-T8), and Drainage Design Manual.
Geometric policies for horizontal curve radius formulations, maximum superelevation rates (e_max 4%, 6%, 8%), Stopping Sight Distance (SSD), and Passing Sight Distance (PSD) calculations.
Structural Number (SN) equations, layer coefficient substitution (a1, a2, a3), drainage coefficients (m2, m3), and rigid pavement slab thickness sizing via Westergaard equations.
Rational Method peak runoff equation (Q = 0.278 * C * I * A) and Manning's open-channel formula (V = (1/n) * R^(2/3) * S^(1/2)) for pipe culverts and lined trapezoidal side ditches.
Clear Zone hazard evaluations, embankment slope severity analysis (fill height vs. steepness), and roadside obstacle warrant matrices for W-beam guardrails and concrete safety barriers.
Standardized XML parsing for civil infrastructure alignments, profile geometry elements, spiral transitions, and cross-section volume datasets across major CAD suites.
Why Infrastructure Teams Choose InfraDigital CAD
Client-Side Privacy Architecture
Survey coordinates and alignment data are processed locally in your browser. Client-side execution supports project confidentiality and internal data handling protocols.
Zero Software Installation
No bulky CAD license required for quick field checks, alignment reviews, or submittal audits. Runs on any desktop, laptop, or tablet.
Standard-Referenced Calculation Precision
Deterministic algorithms replace manual spreadsheets with validation criteria derived from recognized engineering manuals.
Civil 3D Native Workflows
Inputs and outputs mirror Autodesk Civil 3D naming, station notation, and LandXML structures for friction-free round-trips.
Featured Engineering Guides
AASHTO Guidelines for Superelevation Transitions
Comprehensive analysis of relative gradient formulas, tangent runout distribution, and transition curve placement for two-lane rural highways.
ERA 2013 Highway Design Standards & Constraints
An overview of design guidelines detailing functional road classes, terrain classifications, and geometric speed thresholds.
Hydrologic Design of Crossing Structures & Culverts
Formulas for peak runoff discharge, culvert inlet and outlet velocities, and Manning open channel hydraulic sizing.
Interactive Engineering Tutorials
Follow structured, step-by-step workflows walking through complete road design procedures — from raw total station point imports to standardized profile sheets.
Standard Starter Datasets & Templates
Download pre-formatted LandXML files, alignment curve CSV tables, survey point clouds, and drainage catchment spreadsheets ready for immediate testing.
Developed by Highway Technologists
Yonatan Abrham
Highway Design Engineer & Infrastructure Technologist
Ethiopian Engineering Corporation • University of Gondar Alumni
Yonatan Abrham is an infrastructure specialist with extensive experience in major road corridors, geometric alignment optimization, and computational civil engineering across East Africa. InfraDigital CAD was created to eliminate brittle spreadsheet workflows and provide practicing engineers with tools implementing documented engineering criteria.
Verified Profiles & Research
Common Technical & Policy Inquiries
Have Feedback or Need a Custom Engineering Tool?
We actively develop tools tailored to specific road agency manuals, regional drainage criteria, or specialized LandXML exports. Send us your requirements or report an edge case.