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APPENDIX E

General Noise Assessment

The FTA General Noise Assessment procedure was used for calculating noise from transit sources associated with the proposed project. The noise impact is assessed based on a combination of existing ambient noise exposure and the additional noise exposure that will be caused by the proposed project.

Existing Noise Exposure Levels: The Light Rail Rapid Transit (LRRT) system located on Main Street is the major source of existing noise in the vicinity of the proposed project. The FTA manual categorizes LRRT as a Fixed-Guideway Transit Source. The LRRT travels an average speed, S of 15 miles per hour across the project corridor. The average number of cars per train, Ncars is assumed to be three for this analysis (based on two cars during off-peak periods, three cars during peak periods, and four cars during special events and downtown sporting events). The LRRT system operates from approximately 5:30am to 1:00 am every day of the year. The LRRT operating schedule, obtained from NFTA website is presented in Table E-1.

Inbound

Outbound

Inbound

Outbound

7am - 9am

8

7

8

8

9am - 2pm

9

8

7

7

2pm - 7pm

8

8

8

7

7pm - 10pm

6

7

10

9

10pm - 1am

6

7

10

9

1am - 6am

--

--

--

--

6am - 7am

8

7

8

8

Table E-1. LRRT Operating Schedule*

Period

Headway (minutes)

Trains per hour

Total

*The schedule above is for weekdays. Assume the weekday schedule for all seven days of the week.

Daytime

Nighttime

16 14 15 19 19 -- 16

From Table E-1:

The average hourly volume of train traffic, V within the study area (i.e., from the Theater Station to Erie Canal Harbor) = 99 trains/24 hours = 4.1 trains/hour;

The average hourly volume of traffic during daytime (7 am to 10 pm), Vd = 64 trains/15 hours = 4.3 trains/hour; and

The average hourly volume of traffic during nighttime (10 pm to 7 am) Vn = 35 trains/9 hours = 3.9 trains/hour

The rail track is jointed within the proposed project area and has an embedded track configuration (128 lb girder rail buried in concrete). There is no aerial structure with slab track. There is also no noise barrier blocking the line of sight from each noise sensitive receptor.

E-1

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