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.
24 Infrastructure Engineering Tools
Road Cross-Section Coordinates
Calculate lane and shoulder offsets and elevations from entered widths and crossfalls. View the section and download coordinate CSV.
Route-Option Comparison
Compare road alternatives using project evidence, documented reviewer scores, and weights. Test ranking sensitivity and download an audit CSV.
Horizontal–Vertical Alignment Phasing Review
Compare horizontal and vertical curve station ranges on a shared basis. Inspect overlaps and gaps and export a paired review list.
Field Test Coverage Register
Reconcile recorded field tests against project targets by lot, material and method. Review gaps, duplicates and unmatched records.
Standardized Drawing Submission Generator
Builds standardized directory hierarchies for drawing submittals (Concept, Preliminary, Detailed Design) and exports immediate ZIP packages.
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.
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.
Earthwork Quantity Takeoff Assistant
Audit earthwork from actual cross-section spacing and export consolidated or linked Excel quantity workbooks.
Bill of Quantities (BoQ) Standardizer
Structures design takeoff quantities into standardized Divisional BoQ items aligned with Ethiopian Roads Administration Standard Technical Specifications.
Mass Haul Diagram & Balance Calculator
Computes algebraic cumulative mass-haul ordinates, identifies economic balance points, and evaluates cut-fill borrow/spoil requirements.
Structure Plan-Profile Sheet Creator
Creates structured engineering data sheets for cross-drainage culvert structures, invert levels, skew angles, and headwall coordinates.
Flexible Pavement Structural Sizer
Estimate cumulative traffic loading, check its traffic class, and review supported flexible pavement layer and overlay presets.
Culvert & Side Ditch Sizer
Estimate peak runoff, screen full-barrel culvert capacity, and estimate normal depth in a trapezoidal ditch.
Sight Distance Calculator
Estimate dry paved-road stopping sight distance and compare selected ERA passing-distance and vertical-curve references.
Expansive Soil Classifier
Identifies and classifies high-swelling active clay soils using Plasticity Index (PI), Liquid Limit (LL), and Clay Fraction indicators.
Pavement Layer Substitution Calculator
Computes structural layer equivalencies based on AASHTO structural layer coefficients (a1, a2, a3) to swap or optimize layer thicknesses.
Guardrail & Barrier Warrant Evaluator
Evaluates embankment height, side slope severity, and roadside obstacle hazard offset to determine barrier warrants.
Rigid Pavement Slab Sizer
Calculates required concrete slab thickness, dowel bar sizing, and tie bar spacing using Westergaard stress equations and AASHTO rigid equations.
Junction & Roundabout Geometric Checker
Audits entry deflection angles, inscribed circle diameters (ICD), circulatory roadway widths, and sight triangles against safety criteria.
Road Signs & Markings Estimator
Calculates regulatory, warning, and informational sign requirements and thermoplastic pavement marking quantities per linear kilometer.
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.
Terrain & Topography Classifier
Classifies longitudinal profile segments into Flat, Rolling, Mountainous, or Escarpment terrain per five-kilometer slope gradient thresholds.
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 CSV or Excel results where supported, print calculation reports, and verify CAD interchange in your target release.
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 = C * I * A / 360, with I in mm/h and A in hectares) 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
Superelevation transitions: runoff, runout and station checks
Calculate and audit a two-lane superelevation transition with a worked station schedule, edge-grade checks and a Civil 3D handoff.
ERA 2013 Highway Design Standards & Constraints: Complete Technical Manual Reference
A comprehensive engineering reference to the Ethiopian Roads Administration (ERA 2013) manual series, detailing geometric controls, traffic classes T1-T8, subgrades S1-S6, and pavement catalogues.
Screen a Small Crossing with the Rational Method and Manning Flow
Work through a synthetic 16-hectare catchment and compare preliminary full-barrel capacity and ditch normal depth with separate design checks.
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 synthetic CSV examples for alignment, survey, earthwork and structure workflows.
About the developer
Yonatan Abrham
InfraDigital CAD developer
InfraDigital CAD provides browser-based checks and formatters for highway engineering. See each tool’s source and limits before using its output.
Common Technical & Policy Inquiries
Is my engineering project data uploaded or saved to remote servers?
Can calculations be used directly for construction permit submission?
Which specific highway design manuals and codes are implemented?
Can I import outputs directly into Autodesk Civil 3D?
Is InfraDigital CAD free to use?
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.