• Construction Noise
• Measurement
• Noise Barriers
• Noise Compatible Planning
• Regulation and Guidance
• Resources
• Tire Pavement Noise
• Traffic Noise Model
  • TNM 25th Anniversary
  • Consistency Test Suite
  • Old Versions
    • TNM Version 3.1
    • TNM Version 3.0
    • TNM 2.1
    • TNM 2.0
    • TNM 1.1
    • TNM 1.0b
    • TNM 1.0a
    • TNM 1.0
  • TNM 2.5
  • TNM Version 3.2
• Training

Traffic Noise Model

FHWA Traffic Noise Model Version 1.0b

The FHWA TNM Version 1.0b is the latest update to the Version 1.0 release package. It requires the complete release package for use. This update is independent of the V1.0a update. It can be performed whether or not the V1.0a update has already been performed.

This version includes the following:

• Addressed additional fatal floating-point error crashes.
• Implemented an error-catching mechanism. .
• Implemented two small changes in the acoustics.
• Addressed data base (DB) errors.
• Implemented two new input error checks.

To use Version 1.0b, download TNM1_0B.EXE, rename it to TNM.EXE, and then replace the existing TNM.EXE file located in your TNM/PROGRAM directory with the new executable file.

The previous version of NMPlot was having difficulties running on very fast computers (typically faster than 200 MHz) giving some users a runtime error message. The developer of NMPlot has recently released a new DOS version of NMPLOT, Version 3.06, which corrects this error. To use Version 3.06, replace the existing NMPLOTX.EXE file located in your TNM/PROGRAM/NMPLOT directory with the new executable file.

The following documents are associated with the FHWA TNM Version 1.0b:

1. TNM 1.0b Read Me: Readme file describing the changes included in TNM 1.0a in detail
2. FHWA Traffic Noise Model Version 1.0a and 1.0b, click here to download TNM Version 1.0a update (4.2Mb) requires TNM 1.0 installed
3. Click here to download the NMPLOT Version 3.06 update (458Kb)