Office of Planning, Environment, & Realty (HEP)
Environment
The minimum recommended system requirements for the most current version of TNM are:
Minimum system requirements for older versions of TNM such as 1.0, 1.0b can be found on Page 2 of the TNM User's Guide.
TNM Version 2.5 can be purchased from the McTrans Center for $695. Owners of previous versions of TNM (1.0, 1.0a, 1.0b, 1.1) can purchase the TNM 2.5 at the discounted price of $495 -- almost 30 percent off the regular TNM price.
*Current registered users of TNM Version 2.0 receive the TNM Version 2.5 upgrade at no charge. Users who purchased any version of TNM on or after March 1, 2002, may also obtain the 2.5 upgrade at no charge.
The most recent version of TNM is Version 2.5 released in April, 2004.
Yes, some users may want to switch from TNM 1.1 to 1.0b when calculating sound level contours, since 1.0b performs better with contour calculations. To run different multiple versions of TNM, install each version in its own unique directory. To install TNM 1.1 along side TNM 1.0b, for example, you'll need to assign each version a unique system file; prior to Version 2.0, TNM installations use the same system files. For instructions on how to install TNM 1.1 alongside an existing TNM installation.
Please send your user registration information to TNM Tech Support for verification. The support team will then provide you with a link to download the free upgrade.
Owners of previous versions of TNM (1.0, 1.0a, 1.0b, 1.1) can purchase TNM 2.5 at the discounted price of $495.
You will need to set your computer monitor's resolution to 1024 x 768 or greater, 16 bit colors or greater, and the smallest available font size. You can usually accomplish this in the computer's Control Panel, Display, Settings function.
TNM sometimes crashes when certain screen savers start. If this happens, discontinue your screen saver when running TNM.
TNM setup places some temporary files in your temp directory. This is usually C:\TEMP, but may be different for computers on a network. Copy the TNM installation file to your local C:\TEMP directory on your computer and run the file from there.
The TNM User's Guide Addendum can be found on the TNM Version 2.5 web page or by clicking here.
Services are available to help you with your questions. Registered owners are entitled to receive technical support and information on upgrades and supplementary guides. For installation and supplementary guide information, users may contact the McTrans Center at (352) 392-0378 or http://mctrans.ce.ufl.edu. For technical support, users are encouraged to take advantage of this Frequently Asked Questions page and other features in our support page. Users may also contact TNM technical support via email support@trafficnoisemodel.org.
The FHWA TNM, Version 2.5, is the current model version. To comply with 23 CFR, Part 772.17 the FHWA TNM, Version 2.5 (or any other model determined by the FHWA to be consistent with the methodology of the FHWA TNM) is required to be used on all Federal-aid highway projects.
A Microsoft® Windows 95/98/ME compatibility bug has been discovered in TNM Version 1.1. This error does not occur for Windows NT or Windows 2000 users. To avoid this error (after creating a new run and after calculating a run), close the run, then re-open it. All dialogs and tables will then open correctly. This has been corrected in TNM Version 2.0 and above.
You can also export a GIS program into both a DXF file(s), and an Excel spreadsheet. Then, import the DXF file into TNM and convert each TNM Object to its appropriate feature. Finally, cut/paste point names from corresponding excel sheet.
It may also be important not to paste overly precise numbers into coordinate cells. For example, avoid pasting 46.78 as a coordinate, since TNM allows only values to the nearest 0.1. You could actually use Excel's Round() function for this, rather than relying upon display rounding. TNM's limit on coordinate precision is built into its database structure. It is not just a display matter in TNM's spreadsheets.
TNM input dialogs located in the Input menu accept all your text input. TNM tables provide input and result summaries for documentation and printout purposes only.
You will need to set your computer monitor's resolution to 1024 x 768 or greater, 16 bit colors or greater, and the smallest available font size. You can usually accomplish this in the computer's Control Panel, Display, Settings function.
Some items in the dialog header area are used to enter default information that you would like subsequently created objects to contain. For example, you might first input your desired values of roadway width and pavement type in the roadway dialog header area. Then, as you digitize subsequent roadways, those new roadways now contain the values you entered in the header.
23 CFR 772.17 requires the use of FHWA TNM version 2.5 or any other model determined by the FHWA to be consistent with the methodology of the FHWA TNM version 2.5. There have been several versions of the FHWA TNM that have been superseded by version 2.5. However, the changes in the versions have resulted in minor changes in how the user would use the model, especially from versions 1.1 to 2.1. The use of the model should not be confused with the results of the model. Identical input into different versions of the FHWA TNM, especially version 2.5 to earlier versions, would result in some differences in calculated sound level results. This is due to some changes to the algorithms in version 2.5 and not how the user would use the model. Information on the differences between the versions can be found on the Release Notes, User's Guide Addendum and/or Validation Studies listed on the webpages for the individual versions of the FHWA TNM.