TNM 3.0 The Federal Highway Administration’s Traffic Noise Model ® version 3.0

(2016 Draft Release Version Information)

Separation of the UI from the Acoustical formulas to simplify future updates

Acoustics

Bug fixes to acoustical algorithms found in TNM 2.5

Removal of TNM 2.5’s interpolation below 250 Hz and extrapolation above 5000 Hz

Calculations for all 1/3 octave bands

Calculation of single barrier reflection values

Creation of a Roadway Acoustic Impedance Hierarchy in cases of overlapping roadways

Ability to add flow control devices at any point of a roadway without needing to create a new roadway segment

Updates to the ability to calculate Ldn and Lden

Addition of the L10 and L50 noise descriptors

Updated free-field divergence that accounts for the horizontal and vertical components

User Interface

Graphics and Map-based User Interface (UI)

Multilane creation tool

Parallel barrier analysis tool integration

Enhanced line of sight analysis

Ability to dock floating windows and have a split screen

Enhanced edit menu

Simplified ‘hide or show’ features functionality

3D views through a stand-alone GIS desktop application

Help Menu embedded within TNM 3.0

Ability to process Geographic Information Systems (GIS) and Computer-aided Design (CAD) files

Updated printing and saving

Transparency toggles

New Features in TNM 3.0

ArcGIS for Desktop 10.2 AutoCAD 2014

MicroStation V8 (SELECTseries 3)

Minimum Software Requirements for Extension Users

(for software performance)

Minimum System Requirements for TNM 3.0 Users

(for optimal software performance)

OS: Windows 7 or higher (not compatible with Mac OS) RAM: 16 GB Graphics Card: Intel® HD Graphics (or equivalent)

ROM: 20 GB or more of free space available for working (2 GB minimum for install) CPU: Intel® Core i5 or i7 (or equivalent CPU)

TNM 3.0 3D View on computer desktop.

TNM 3.0 Plan View on computer desktop.

The Federal Highway Administration’s (FHWA) Traffic Noise Model (TNM) is a software application for the modeling of highway traffic noise. FHWA’s TNM 3.0 ® is the latest version of this software. State and local entities seeking to use Federal Aid Highway Program (FAHP) funding, must use the TNM to analyze potential noise impacts from their proposed project. TNM 3.0 is a major update to the previous version - TNM 2.5. The TNM 2.5 was released in 2004 and no longer meets modern standards of interface design or software maintenance. TNM 3.0 incorporates new technology and research; and accounts for input received from TNM 2.5 users over the past 12 years.

What is TNM 3.0?

Publication Number: FHWA-HEP-17-025

Esri ArcGIS Runtime Microsoft .NET Framework Cesium Viewer/WebGL 3-D

Microsoft Visual Studio 2010 with .NET 4.0 C#

PowerCollections GeoAPI C5

Tortoise HG Mercurial(HG) NUnit

Software Basis for TNM 3.0

TNM 3.0 split screen functionality showing plan view (left) and 3D view with green line of sight visualization lines (right).

TNM 3.0 startup screen (left) and basemap (right).

TNM 3.0 as it would appear on a typical desktop. This image shows the ‘Reports’ drop-down menu (top), ground zones input dialog box (bottom left), and calculated noise levels (bottom right).

The current release is a Final Draft version of TNM 3.0. It will be available for download and use for 6 months. Users will be able to provide comments and ask questions during this period. FHWA will consider the input received prior to releasing the Final version of TNM 3.0 for required use on projects. For status updates please see: http://www.fhwa.dot.gov/environment/noise/traffic_noise_model/tnm_v30/ Or contact us through TNMComments@dot.gov

TNM 3.0 Draft Release

TNM 3.0 is also accessible as an extension to Esri’s ArcGIS ®, AutoDesk’s AutoCAD ®, and Bentley’s MicroStation ®. Complex highway design and alignment work can be completed in CAD and GIS environments using native tools, while allowing the design team to test their work with the underlying, integrated noise model. Engineers will be able to present roadway projects, including the noise abatement plans, to the public more easily using the new interfaces.

Interoperability with ArcGIS, AutoCAD, and Microstation

Development Schedule

January-February 2017 Draft Release of TNM 3.0

July-August 2017 End 6-month comment period

Fall 2017 FHWA consideration of comments and questions

Winter 2017 Update TNM 3.0 if necessary

Spring-Summer 2018 Final release of TNM 3.0 and associated 23 CFR 772 updates