Prior to the release of the Federal
Highway Administration Traffic Noise Model (FHWA TNM), the FHWA
Highway Traffic Noise Prediction Model (FHWA-RD-77-108), or ``108
model,'' was in use for over 20 years. Although an effective model
for its time, the ``108 model'' was comprised of acoustic
algorithms, computer architecture, and source code that dated to
the 1970s. Since that time, significant advancements have been made
in the methodology and technology for noise prediction, barrier
analysis and design, and computer software design and coding. Given
the fact that over $500 million were spent on barrier design and
construction between 1970 and 1990, the FHWA identified the need to
design, develop, test, and document a state-of-the-art highway
traffic noise prediction model that utilized these advancements.
This need for a new traffic noise prediction model resulted in the
FHWA TNM. The FHWA is currently developing the TNM version 3.0,
with an anticipated beta-testing of this version towards the end of
2012. Version 3.0 is an entirely new, state-of-the-art computer
program used for predicting noise impacts in the vicinity of
highways. It uses advances in personal computer hardware and
software to improve upon the accuracy and ease of modeling highway
noise, including the design of effective, cost-efficient highway
noise barriers. This information request is to gather information
from the beta-testers on their computer configurations, their
experience using the FWHA TNM and availability of TNM
files.
On behalf of this Federal agency, I certify that
the collection of information encompassed by this request complies
with 5 CFR 1320.9 and the related provisions of 5 CFR
1320.8(b)(3).
The following is a summary of the topics, regarding
the proposed collection of information, that the certification
covers:
(i) Why the information is being collected;
(ii) Use of information;
(iii) Burden estimate;
(iv) Nature of response (voluntary, required for a
benefit, or mandatory);
(v) Nature and extent of confidentiality; and
(vi) Need to display currently valid OMB control
number;
If you are unable to certify compliance with any of
these provisions, identify the item by leaving the box unchecked
and explain the reason in the Supporting Statement.