Bentley Rail Track / Power Rail Track Rail Infrastructure Design and Optimization Overview

Bentley Rail Track can be configured to support a wide range of international standards, providing engineers and designers with the flexibility and control necessary to deal with real-life design scenarios on global rail infrastructure projects. The software adapts readily to virtually any rail design and maintenance workflow and is suitable for light rail, metros (transit), heavy rail, high-speed rail, and MAG-LEV projects.

Addressing horizontal and vertical track geometry as well as yard, depot, station layouts, earthworks, and ballast users can generate realistic 3D models for analysis and project visualization, create reports for cost estimates and setting-out, and produce fully annotated project drawings and deliverables for client approval and construction.

Flexible, Versatile, and Configurable

With Bentley Rail Tracks extensive toolset, users can create horizontal and vertical geometry complete with all rail hardware; perform horizontal and vertical regression analysis, cant, and superelevation design; and analyze geometry as concurrent, integrated activities. An intuitive graphical user interface provides easy access to an impressive set of interactive geometry tools for on-screen placement, modification, and extension of alignments. The software delivers Civil AccuDraw, a civil-specific version of MicroStation AccuDraw, a precision drafting tool that anticipates the users intent, reducing the number of mouse clicks and other actions required to achieve drafting tasks. Civil AccuDraw streamlines the drafting process by supporting civil-specific drafting conventions, with options for stations and offsets, bearings and distances, azimuths, and more.

Bentley Rail Track offers unparalleled capabilities to create, maintain, and analyze geospatial information as part of the rail infrastructure asset lifecycle. The software facilitates integration of geospatial data within engineering workflows, allowing users to enforce industry and topological standards as well as define and observe the behavior of geographic objects. Bentley Rail Track provides engineering accuracy, CAD flexibility, and easy-to-use GIS tools in one, fully compatible environment.

In Bentley Rail Track, turnouts including fundamental types based upon international standards are stored in a user-definable library and placed dynamically. Toolbars can be customized, grouping commonly used tools for repetitive tasks or specific workflows, to more rapidly evaluate design alternatives. Advanced functionality, such as curvature diagrams, slew diagrams, interactive track editing, automated cant and superelevation analysis, and tight integration with Bentley ProjectWise Bentleys project collaboration system for connecting people and information across project teams completes this best-of-class application.

Field Data and Analysis

An all-in-one rail solution, Bentley Rail Track offers a full complement of functionality that enables users to work seamlessly with survey, GPS, LiDAR, and other forms of field data. The Text Import Wizard streamlines import of track geometry data for existing alignments, regardless of whether rail survey data is for rails or the track centerline. Built-in tools automatically sort and convert data to horizontal, vertical, and cant alignments for regression analysis and use downstream in the design process. When the design is complete, design data can be uploaded to data collectors for stakeout or machine guidance devices for site preparation.

Adaptable Alignment Design

Bentley Rail Track provides a complete set of coordinate geometry (COGO) and advanced alignment capabilities true geometric tools that give users unlimited options to dynamically edit and manipulate geometry interactively via graphics or through precision key-ins. Users can place elements with varying degrees of freedom from free to floating to fixed and define vertical parabolas or circular vertical curves with vertical transitions to achieve successful results. To accommodate the various horizontal transitions required on rail projects, the software delivers comprehensive mathematical and associated cant transition algorithms. A check integrity function locates discontinuities and highlights potential issues, such as nontangential curves, for resolution or correction.

Integrated Cant Design

The integration of cant and superelevation with the horizontal design process provides users with immediate visual confirmation of compliance to design standards. The software possesses the innate ability to compute equilibrium cant, applied cant, cant deficiency, rate of change of applied cant, rate of change of cant deficiency, and cant gradient. The computed transition lengths and applied cant can then be adjusted to optimize the alignment to all cant criteria, including the deployment of virtual transitions where required.

Library of Turnouts/Switches and Crossings

Bentley Rail Track provides comprehensive functionality for placement of turnouts, switches, and crossings as parametric components. Users can quickly place turnouts using the standards libraries provided. Included are standards for Austria, Germany (heavy and light rail), Holland, India, Italy, Russia, South Africa, Spain, Switzerland, United Kingdom (113As and NR60s), United States, and Canada (AREMA).

Users can create complex geometries based upon bending and flexing rules. Alternatively, users can create their own turnout designs and save them to libraries for future use. The software handles turnouts, single and double slips, and diamond crossings. The Connection Editor is used for more advanced geometric connections such as crossovers and sidings. Designs can be edited at any stage in the process, changing the turnout type or position dynamically. At the same time, the software maintains defined design rules and relationships automatically healing turnouts and thereby increasing productivity while saving time, lowering the margin for error, and promoting design ingenuity.

Regression Analysis

Bentley Rail Tracks single- and multiple-element regression analysis employ a rigorous least squares method to calculate best-fit alignments. Regression tools provide users with a quick and easy way to match existing track geometry more precisely. Regression analysis is an essential step in any track maintenance or upgrade project, and Bentley Rail Track helps optimize the new design alignments by limiting slews and lifts. Bentley Rail Track also includes powerful, but easy-to-use, curvature diagrams to help users identify curves, tangents, and spirals ensuring the regression tools provide the results required for track realignment. Regression points can be derived from the centerline or rail survey (including cant data), and can be weighted by users for fixity during analysis to maintain critical points or ensure minimum clearance is achieved. Analysis results are quickly viewed and points can be added or deleted from the regression analysis, providing users complete control throughout the engineering process.

Support for Light Rail

Bentley Rail Track accommodates the requirements of light rail design, fabrication, and construction. The software enables users to create detailed light rail elements rails, joints, switch points, crossing points, and distance keepers and produce all drawings, reports, and specifications needed for fabrication of jointed rail, pre-bent rail, and multiple rail types.

Feature-Based Surface Modeling

The software enables users to create intelligent, 3D topographic models containing track information, terrain data, railbed, and related site features. The model may also contain other corridor features roadways, utilities, drainage, etc. Intelligent features are visually distinguished by structure, style, and graphical symbology. Surface models are formed using proven and tested triangulation methods and may represent existing topography, design, or a combination thereof. Intelligent modeling allows users to incorporate features such as rails, ballast edges, drainage, and other topology into the model. Features may be non-uniformly occurring points or breaklines that represent connected linear segments ridges, edges of ballast and roadways for example. Interior voids (holes) may represent building footprints, lakes, or areas of null information. Models may be bounded by an exterior boundary feature formulating the exact edge of modeled or collected data.

Powerful 3D Modeling

Bentley Rail Track offers in-context, smart design of 3D rail corridors with Roadway Designer. Roadway Designer streamlines the complex development of virtually every aspect of a corridor in a single, parametric presentation. Users can travel along a corridor viewing and dynamically designing closed shapes that represent manmade materials such as ballast, sub-ballast, sleepers, and related structures in concert. The software automatically produces dynamic volumes to aid in balancing cut-and-fill.

Roadway Designer displays four-port views of the design in plan, profile, cross section, and cant or superelevation. As work progresses, users experience immediate visual feedback in all views. Rail corridors are easily modified by direct manipulation of parametric graphical components or by precision input in context-sensitive dialog boxes. The unique features of Roadway Designer allow users to target known existing features, enabling models to conform to on-ground demands. As designs develop, color-coding displays potential problem areas. Roadway Designer enables users to test design decisions before they are applied.

Roadway Designer offers state-of-the-art design automation. From horizontal alignment, vertical alignment, and surface information, the software generates 3D models of the full track corridor using user-defined typical sections including earthworks or end conditions. The software automatically ensures conformance to standards as it speeds the corridor development process. When widening sub-ballast and sub-grade, Roadway Designer automatically creates transitions according to user design criteria. Users can interactively edit cant and superelevation on the fly.

Users easily modify and create intelligent design components no programming required and apply design constraints for sleek control of the 3D parametric modeling process. Components can be open- or closed-shape and include multiple construction layers, barriers, slopes, and ditches. Roadway Designer automatically creates surfaces for generating cross sections, performing volume calculations, and aiding visualization and rendering. Users can also merge components to create a single surface, or create a surface of the entire rail corridor.

Visual Design Verification

Design verification has never been easier. Bentley Rail Track allows users to virtually drive through the 3D model and visually inspect for any design deficiencies or physical conflicts. In 3D QA, engineers can fully view track features from all angles to identify gaps or misalignments, look for utility conflicts, and check clearances. They can also visually evaluate sight distances, signaling, and other track-side infrastructure, as well as try out multiple aesthetic treatments to reach desired results. Using Bentley Rail Track rendering features such as color fill, shading, lighting, and backgrounds improves the design at any phase and adds a level of assurance in project constructability.

Design Validation, Annotation, and Reporting

Bentley Rail Track includes built-in design checks to highlight areas of non-conformance to the selected design standard. Functionality ranging from simple checks against parameters including design speed, applied cant, and cant deficiency in the Cant Alignment Editor to more comprehensive checks against specific country standards enables users to identify and resolve problems early in the design process.

Users can also create a dynamic Swept Envelope Analysis using track geometry and a library of 3D vehicle objects. Used extensively in light rail and metro projects, this tool ensures clearance to surrounding infrastructure and between vehicles on adjacent tracks.

In addition, designs can be visually validated using curvature, lift, and slew diagrams, as well as numerically using plan and profile annotation. Bentley Rail Track uses XML/XSL technology to report all geometry (horizontal, vertical, and cant) and modeling results delivering greater format flexibility when creating reports.

Storm and Sanitary Network Design

Bentley Rail Track provides a comprehensive toolset for surface and wastewater collection systems, allowing users to interactively create a 3D associative model relative to the existing ground, design models, and track geometry. Users can manipulate networks in plan or profile views, displaying the Bentley Rail Track drainage model, as well as other utilities modeled in the software. This allows users to plan for clash avoidance and identify potential problem areas before they occur. Users can model, analyze, and design complete storm water and sanitary sewer networks, replete with inlets culverts, channels, catch basins, manholes, pumps, and pipes.

A robust set of computation tools account for the full array of surface runoff conditions and perform design checks to ensure conformance with minimum and maximum requirements using industry-standard hydraulic methods for system design and analysis. Rational, Modified Rational and Soil Conservation Service Unit hydrograph modeling and pond-routing routines calculate hydrologic impacts for pond sizing and outflow characteristics. Users can create the full set of hydrographs, drawings, and reports.

Project Deliverables

Bentley Rail Track provides design, volumes, and cross-section data in the XML industry standard format for data exchange and reporting. Project data can be delivered in a variety of formats, including Excel spreadsheets, HTML or text files, PDFs, printable documents, and other output. Reporting tools automate the production of numerous standard reports including horizontal and vertical alignments, curvature diagrams and/or slew diagrams, quantity takeoffs, clearance reports, stakeout, surfaces, and more. The software outputs standard formats for Trimble, Topcon, and Leica for machine-controlled grading and machine guidance, as well as Plasser & Theurer (ALC and WinALC systems) and Matisa tampers (the PALAS system) for construction.

Features At-A-Glance

Survey/Data Acquisition

Read/write standard data formats automatically for: o Raw survey data from all major survey equipment o 2D/3D CAD graphics o ASCII/text data formats o LandXML geometry (horizontal, vertical, and cant) and

surface data o LiDAR data: ASCII and LAS o USGS Digital Elevation Model data o Aerial photographs o Raster files o Contour maps o Photogrammetric data

Reduce survey data Support feature coding for custom survey feature connectivity, display,

and annotation Adjust raw data using Compass, Crandall, Transit, Level, and Least Squares methods Edit survey fieldbook data graphically and dynamically Change instrument set-up with automatic updating Add, modify, or delete points and chains Change codes and styles capabilities Support Versine Import geometry or surface data in virtually any ASCII format via Text

Import Wizard Upload data collectors for construction stakeout Upload Plasser & Theurers EM-SAT geometry measurement system

Mapping and Infrastructure GIS

Compile and efficiently edit data Design, build, and publish accurate maps Enforce business and topological rules Provides CAD flexibility and GIS ease-of-use and efficiency to engineering workflows Take advantage of full compatibility with Bentleys AEC applications Analyze and present intelligent spatial analysis, thematic display, and buffer creation

Feature-based DTM and Feature Editing

Create intelligent 3D models Model intelligent civil features for ditches, curbs, trees, culverts, etc. Pass survey intelligence to 3D DTM modeling Edit context-sensitive intelligent features Extend, trim, and intersect features Insert, move, and delete vertices Delete, partially delete, break, or join features Copy or transpose features Support boundaries, holes, breaklines, inferred breaklines, and

random points Analyze features with intuitive terrain modeling tools Manage large LiDAR datasets Base presentation and labeling by feature definition Exclude non-DTM features from triangulation Copy surface or portion of surface

DTM Analysis

Update plan, section, or profile

Generate contours from data points accounting for breaks, random points, voids, edges, and other criteria

Control maximum length of triangles Display cut and fill delineation View and edit feature properties Develop custom feature styles Control point density of linear features to optimize surface presentation Color code display by triangles, slopes, elevation, and aspect View slope vectors Analyze line of sight Visualize gridded DTMs, profiled models, and elevation models Thin surfaces Generate grade contours Interrogate surfaces Display isopach

Geometric Design

Use interactive geometry tools for immediate design visualization Use methods and principles specific to rail design and civil engineering Create horizontal by points-of-intersection (PI) method or by elements:

o Lines o Circular arcs (arc and chord definition) o Multiple spiral transition definitions, including:

Clothoid Cubic parabola Bloss Biquadratic parabola Sinusoidal Cosine Viennese-Austria

Associative and dynamic editing of elements, maintaining curve definition and tangency Create vertical by PI method or by elements:

o Lines o Parabola o Circular arcs

Vertical clothoid transition spirals Edit, delete, or join geometric elements Check Integrity for location and removal of discontinuities and resolution of tangent and non-tangent

curves Assign and edit stationing automatically Annotate alignments, stations, and COGO points Precision PI definition Define curve sets parametrically Create multiple vertical alignments per horizontal alignment Review and report geometric elements Dynamic annotation Perform design checks dynamically or in batch processes Use curve and spiral calculators Display geometry as 3D elements

Cant

Use equilibrium equations (Eq = 11.82 * V2/R) Compute equilibrium cant, applied cant, cant deficiency, rate of change of applied cant, rate of

change of cant deficiency, and cant gradient Supports ASCII tables Compute transitions to match existing horizontal transitions Compute virtual transitions (where horizontal transitions are not required, but cant is required) Incorporate design checks when editing Edit horizontal curves with integrated cant

Regression Analysis

Generate horizontal and vertical alignments from existing data using least squares solutions

Regress single or multiple elements Regress horizontal and vertical elements Detect points automatically for inclusion based upon direction and

distance tolerances Convert surveyed rails to centerline Review and edit regression points on demand Exclude or include points in regression by selection criteria or data

analysis review Automate point interrogation by user-defined criteria Use curve diagrams for curve and transition resolution Use slew diagrams to verify data consistency Identify transition points via rail curvature diagram Include cant via rail curvature diagram for regression

Turnouts

Create and edit turnouts interactively and dynamically for: o Single branch o Double branch o Single slip o Double slip o Diamond crossings

Includes multiple bending methods: o Swiss bending practice o German bending practice o UK tangent and offset practice

Includes industry-standard turnouts: o AREMA o ADIF, FGC, and TRANVIA (Spain) o Denmark o German Rail o German Light Rail o Indian Railways o OBB (Austria) o ProRail (Netherlands) o Russia o South Africa o UK 113A and NR60

Employ tools for user-defined standards Use Turnout Connection Editor to dynamically edit turnout positions/connections

Roadway Designer

Merge horizontal and vertical geometry with 3D topography for application of design standards and typical sections

Define typical sections with horizontal and vertical geometry paths Assign component control points to existing or designed features or geometry, controlling horizontal

and/or vertical location Assign automatic overrides by feature or station intervals View plan, profile, and cross section simultaneously Control view scaling dynamically Display right-of-way, existing ground, and other rail/road centerlines to enhance dynamic interaction Model using parametric templates dynamically and interactively Model dynamically in steps or batch process Manage one or multiple corridors for plans, visualization, cross sections, and reporting Control template sections, stationing, and intervals Transition between disparate templates via 3D interface Allows dynamic editing of cant/superelevation in super diagram Apply exceptions for bridges, voids, and special end conditions Assist problem resolutions through intelligent color coding of transitions, super runout, cross slope

conditions, etc.

Edit individual stations dynamically Reflect edits automatically in quantities and volumes Shade materials for enhanced clarity

Display 3D model-based graphics complete with 3D components

Storm Drainage and Sanitary Sewer Layout and Design

3D modeling o Create 3D drainage model relative to topography and alignments o Place multiple drainage structures along alignments by spacing and offsets o Support interconnected network of pipes, curved pipes, channels, culverts, manholes,

pumps, catch basins, and inlets o Creates associative and dynamic model-based designs o Create storm, sanitary, or combined networks o Build drainage models directly from survey data o Delete or add any size pipe from library o Apply any material and coefficient of roughness o Identify 2D graphics as utilities and drape relative to terrain model o Display all network and utility objects in sections and profiles o Label all attributions in any view or include in user-defined reports o Draw 3D models of drainage structures to full 3D shapes for easy clash detection

Design and analysis o Analyze models using industry-standard equations such as Mannings, Colebrook-

White, Bernouli, and Continuity o Use analysis based upon HEC22, FHWA, HDS 5, 10, 13, Modified o Rational method, as well as regression equations o Base network design upon equations above and sizes selected from user-defined

tables o Compute drainage flows from areas using Modified Rational Method or CS Unit

Hydrograph Method o Compute Tc via FAA, Kirpich, Overland Flow or LADOT methods o Compute Tc from 3D model or specify o Use demand and demographic tables for sewer computations o Supports infiltration, population, and peaking factors as well as land usage o Define and easily edit user parameters o Compute or specify flows

o Generate engineering reports from design and analysis for inclusion in project

notebook o Define custom Intensity-Duration-Frequency tables o Generate drainage queries and reports o Color code based upon queries or set-up styles for special symbology by type and

size Pond routing

o Calculate pond volumes from surfaces or specified dimensions o Create input and output hydrographs o Design inlet and outlet control structures

Quantity Management

Automate quantity takeoffs to streamline quantity estimating Link design features and graphics to a Master Pay Item list Report quantities by entire project or delineated by sheets, stations, area,

or phase Report on design features and graphic elements Deliver more than 60 formulas or easily customize your own, each with unlimited variables and

arithmetic operations Generate linear, area, and volume quantities Integrate non-graphic (mobilization, etc.) quantities in takeoffs and reports Store quantities in a nonproprietary database accessed with Microsoft Office applications Execute reports in stand-alone environment when desired Integrate with Trns*port for pay item list and cost estimates Apply funding splits and payer rules to quantities Choose from more than 30 sample reports, including CSV, HTML, TXT,

and PDF Modify sample reports or create custom reports through XML style sheets

Design Validation

Use industry-standard design checks for: o Austrian Rail

o CEN Standards o Danish Rail o Dutch Rail o German Rail o Transrapid o And more

Review design in curvature diagrams and slew diagrams Annotate plan and profiles Generate XSL/XML reports for horizontal alignments, vertical alignments, and cant

Export to Field for Construction

Plasser & Theurer tampers (ALC and WinALC systems) Matisa tampers (the PALAS system) Trimble Leica LandXML

Integration with Bentley Content Management and Publishing Solutions

ProjectWise, Bentleys engineering project team collaboration system ProjectWise InterPlot, providing teams with publishing solutions for creating accurate and

intelligent deliverables ProjectWise Navigator, visual collaboration for immersive project review and analysis ProjectWise Dynamic Plot, for error-free markup and review

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