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Last modified
4/23/2018 12:13:49 PM
Creation date
1/9/2017 1:54:56 PM
Metadata
Fields
Template:
Official Documents
Official Document Type
Work Order
Approved Date
09/09/2014
Control Number
2014-119
Agenda Item Number
8.J.
Entity Name
CDM Smith Inc.
All Aboard Florida
Subject
Work Order No. 13
Noise Monitoring and Quiet Zone Index Calulations
Alternate Name
Camp Dresser & McKee
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will be collected. During field measurements, average speed of trucks, vehicle counts and class <br />identification (auto, buses, medium trucks, heavy trucks) will be recorded. Frequency, type of train, time <br />and duration of train horn will be documented. Aberrant noise events will be logged for evaluation of <br />the data. Field measurements assist in evaluating the level of noise reduction that may be provided by <br />existing elements such as fences and scattered vegetation that cannot be precisely modeled by the <br />computer. This information will be an important consideration in the determination of noise impacts <br />and the evaluation of any associated noise abatement measures for the project. Consultant will use the <br />Federal Highway Administration Traffic Noise Model (TNM) version 2.5 (TNM 2.5) traffic noise prediction <br />and analysis software to validate the field measurements. Monitoring site features such as roadway <br />width, significant grade changes, and buildings will be modeled to replicate field conditions. No interior <br />noise level measurements will be performed as part of this effort. <br />The days and times for each crossing will be selected to match the conditions observed by AAF as closely <br />as possible, mimicking traffic conditions and train traffic observed. The results will be presented in a <br />letter report to County staff, along with a recommendation by Consultant as to whether or not the <br />readings presented in the AAF Noise Study appear to be accurate and representative. If upon receipt of <br />the Noise Study from AAF the duration of sampling to be duplicated is determined to be longer than 20 <br />minute readings per crossing, an additional authorization may be needed to perform the requested <br />services. These services will be billed at an hourly labor rate of $150/hour, with equipment rental of <br />$170/week. <br />In addition to collecting actual field readings to confirm existing conditions, Consultant will utilize the <br />Federal Railroad Administration (FRA) High -Speed Rail Initial Noise Evaluation Version 2 0 model to <br />calculate the expected noise contribution from a high speed rail train given the site-specific conditions <br />at each of the selected County crossings. <br />TASK 2.0 - QUIET ZONE INDEX CALCULATION <br />The FRA requires additional Safety Supplementary Measures (SSM's) to be installed at all at -grade <br />crossings once track speeds increase from 79 mph (freight/cargo) to a maximum 110 mph (high speed <br />rail). Based on SSM selections and other freight and roadway traffic data, some areas within the County <br />may qualify for a Quiet Zone. <br />Under the FRA Train Horn Rule (49 CFR Part 222), locomotive engineers "must begin to sound train <br />horns at least 15 seconds, and no more than 20 seconds, in advance of all public grade crossings." The <br />Final Rule on Use of Locomotive Horns at Highway -Rail Grade Crossings, published in the Federal <br />Register on April 27, 2005, was intended to: <br />■ Maintain a high level of public safety by requiring the sounding of locomotive horns at public <br />highway -rail grade crossings; <br />■ Respond to the concerns of communities seeking relief from train horn noise by considering <br />exceptions to the above requirement and allowing communities to establish "Quiet Zones"; and <br />■ Take into consideration the interests of localities with existing whistle bans. <br />Communities that feel there are adverse impacts from train horn noise may seek relief through the <br />issuance of a Quiet Zone from FRA. There are currently no Quiet Zones within Indian River County, nor <br />are there any known pre -rule Quiet Zones ("no horn" zones established prior to establishment of the <br />Quiet Zone rules). If the County wishes to petition FRA for Quiet Zones, SSMs are required to mitigate <br />the increased risk resulting from the lack of warning horn usage. <br />Smith A-2 1536 doc <br />
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