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Expressway Noise Barrier / Arrester

Noise arresters, or noise barriers are erected along expressway, speedway and highway roads that go through or are near residential areas to reduce the wind blowing and noise pollution caused by passing vehicles.

We supply noise barrier for expressway project package and Al or Zn/Al absorptive sound shielding panels for central express ways.

Noise barriers meeting Requirements for Expressway Project Package:

Loction Number Chain Edge of Barrier Barrier Length (m) Side Predicted Noise Level Without Barrier (dBA) Barrier Height (m) Predicted Noise Level With Barrier (dBA) Barrier Distance From Road curb (m) Surrounding Oescription
Day Time Night Time Day Time Night Time
1 37+390 - 37+420 30 Left 58 59 3 58 58 1 Three store level House
2 37+490 - 37+510 20 Left 59 59 3 57 57 1 Single Store Level House
3 38+280-38+310 30 Right 60 59 3 58 57 1 Single Store Level House
4 38+350-38-380 30 Right 60 59 3 58 58 1 Single Store Level House
5 38+430-38+630 200 Left 64, 63, 62, 62,59, 60,62, 62 64, 63, 63, 62, 60, 60, 62, 62 3 59, 57, 56, 57, 57, 58, 58, 57 58, 57, 56, 57, 57, 57, 57, 57 1 Row of Single Store & Two Store Level Houses
6 39+340-39+370 30 Left 62 63 3 58 58 1 Single Store Level House
7 39+340-39+400 60 Right 62, 63 62, 63 3 58, 59 58, 58 1 Two Single Store Level Houses
8 39+590-39+640 50 Left 63, 59 63, 60 3 58, 57 58, 58 1 Two Single Store Level Houses
9 40+500-40+560 60 Right 62, 62, 61 61, 62, 61 3 58, 57, 58 58, 57, 58 1 Row of Single Store Level Houses
10 70+730-40+820 90 Right 62, 61, 61, 61, 62 61, 61, 61, 61, 62 3 58, 56, 55, 56, 58 58, 56, 55, 55, 57 1 Row of Single Store Level Houses
11 41+470-41+510 40 Right 62 61 3 58 58 1 Single Store Level House
12 43+050-43+070 20 Right 60 59 3 57 57 1 Single Store Level House
13 43+150-43+180 30 Right 60 60 3 59 58 1 Single Store Level House

 

Modelling Assumptions -
International Calcuiation Standard/Guideline for roads: RSL-90
Road surface meterial: Porous Asphalt 0/9
Building absorption coefficient: 0.3
Ground absorption coefficient: 0.4
Barrier absorption coefficient : 0.4

Day time limit for peak hour = 63 dBA
Night time limit for peak hour = 59 dBA

Note
Height of parpet wall is 1.0m
Meterial of the parpet wall is smooth concrete
The barrier distance considered as 1.0 m from the road curb for cut & filling areas.
Install cantilever barriers on parapet wall or increase the parpet wall height up 30 3m. Angle of the cantilever should be 450
The reported chainages may be vary wlthin ±5m range, because it is difficult to mention the exact chalnages during the field visit at this stage. It is advlced to get the Instructions/advice from ITI at the time of installing the noise barriers in order to locate the barrier at specified locations.

 

Technical Reference - Guideline for Traffic Noise Assessment Criteria For Expressways

Proposed specification for Noise Barrier Central Express way

1. Basic information of the Barrier

Barrier Type

Absorptive barrier

Outer cover

Material should be Al or Zn/Al

Outer cover gauge

0.6mm or above

Front face

Perforated 15% or above

Inner material

Any sound absorption material like mineral wool (Glass wool is not preferred)

Surface density

Should be in the range of 20kgm-2 to 30kgm-2

2. Barrier Properties

Sound transmission class (STC)*

35 or above

Noise Reduction Coefficient / (NRC)*

0.35 or above

* Need product certificate from an accredited laboratory for STC and NRC

3. Barrier Fixing

• Should be an interlocking panel and able to fix panel to panel vertically and horizontally
• Should be able to install on top of a parapet wall as well as filling areas.
• Should be easy to replace in the case of damage.
• Should be Weatherproof.
• Should be UV protected for long term usage.

4. Environmental Suitabilitv

• Suitable for tropical weather.
• Suitable for heavy rain and high speed wind.

5. Structural Information

• Take the recommendation of design engineer based on the above specification.

 

Metal Panel Expressway and Highway Noise Barrier / Arrester has the following features:

1) Light transmission: up to 88%

2) Impact resistance: 80 times that of glass, 15 times that of acrylic sheet

3) Temperature resistance range:-40-120.C

4) Light weight only1/12 of the weight of glass of the same thickness

5) Ultraviolet resistance: with UV protective layer

6) Flame resistance: rated class B1

7) Sound and heat proof

 

Common specifications:

1) Width: 1220mm-2100mm (our regular specification)

2) Length: 20m--50mm(our regular specification)

3)Available in4mm, 5mm, 6mm, 7.5mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm

4) Color: clear, lake blue, green, blue, opal, bronze, gray, red, bronze(brown), blue-green, light-green, black, clear-embossed, light-embossed, blue-embossed

5) Customized colors and dimensions available upon requests

6) Packing: Both sides covered with PE film

 

This kind of noise arresters are popularly used in the following fields:
1) Telephone booths

2) Road signs and advertisements

3) Billboards on lamp boxes

4) Lighting and partition walls for banks, hospitals and stations

5) Greenhouses for vegetables, zoos, aquatic products

6) Sound and heat insulation for expressways

7) Instrument and war industries- windscreens, army shields

 

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