| Title | FHWA Traffic Noise Model, Version 1.0 Technical Manual |
|---|---|
| Record ID | 47769 |
| Personal Name Creator |
Menge,Christopher W.; Rossano, Christopher F.; Anderson, Grant S.; Bajdek, Christopher J> |
| Source | 180p. in various pagings |
| Corporate Creator | Foster-Miller, Inc. |
| Corporate Contributor |
John A. Volpe National Transportation Systems Center (U.S.). Acoustics Facility; United States. Federal Highway Administration. Office of Environment and Planning |
| Publisher | United States. Federal Highway Administration. Office of Environment and Planning |
| Publication Date | 19980200 |
| Language | English |
| Abstract | This Technical Manual is for the Federal Highway Administration’s Traffic Noise Model (FHWA TNM®), Version 1.0 -- the FHWA’s computer program for highway traffic noise prediction and analysis. Two companion reports, a User’s Guide and a data report, respectively, describe the use of TNM and its vehicle noise-emissions data base. The Technical Manual documents the fundamental equations, the acoustical algorithms, and the interactive logic for all computations within TNM. Section 1 overviews the basic elements of TNM's prediction model. It describes the basic concepts of the model, from vehicle noise emissions to predicted sound levels. Section 2 describes TNM's prediction model in more detail, with references to the manual appendixes for detail on algorithms and mathematics. In particular, this section describes the following: (1) vehicle noise emissions for TNM's built-in vehicle types, (2) computation of vehicle speeds, when they are affected by upgrades and traffic-control devices, (3) geometrical complexity in the XY plane, plus computation of free-field sound levels from a roadway segment, (4) geometrical complexity in the vertical plane, along any line between roadway and receiver, plus the computation of attenuation relative to free field along any such line, (5) computation of parallel-barrier degradation for barriers or retaining walls that flank the roadway, and (6) computation of sound-level contours, insertion-loss contours, and level-difference contours. In addition, this manual contains detailed appendixes for each of these subjects. |
| Rosap ID | dot:10000 |
| Rosap URL | https://rosap.ntl.bts.gov/view/dot/10000 |
| TRT Terms | Computer programs; Programming manuals; Noise barriers; Traffic noise; Noise; Sound level; Mathematical prediction |
| General Subjects | Highway traffic-noise prediction; Digitizer; Building rows; Terrain lines; Ground zones; Tree zones |
| Classification | NTL - HIGHWAY/ROAD TRANSPORTATION - HIGHWAY/ROAD TRANSPORTATION; NTL - ENERGY AND ENVIRONMENT - Environment Impacts |
| Geographical Coverage |
United States |
| Contract Number | HW866/H8008 |
| Report Number | DOT-VNTSC-FHWA-98-2; FHWA-PD-96-010 |
| Availability | Volpe National Transportation Systems Center, Technical Reference Center |
| Resource type | Manual |
| URL | https://ntlrepository.blob.core.windows.net/lib/47000/47700/47769/1998-2.pdf |
| Format | |
| Database | NTL Digital Repository |