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Research on the application of smartphone utility software to evaluate traffic noise and road surface iri index - 14


3 ≤ IRI < 5, however, during the measurement process, there were a few points with IRI > 5 due to the road surface having many potholes, some craters, wheel ruts, etc.

3.3.3. Preliminary survey of IRI index on other routes.

Location: Hanoi – Hai Phong Expressway

Prepare:

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phone using the car mount, mark the start and end points of the measurement.

Measurement results: Figure 3.10, Figure 3.11, Figure 3.12


Figure 3.10. IRI index of Hanoi – Hai Phong expressway from Hanoi to Hai Phong

The IRI index on the Hanoi - Hai Phong highway from Hanoi to Hai Phong has an average IRI index of 0.92 (Index measured on RoadLabPro software)


Figure 3.11. IRI index of Hanoi – Hai Phong expressway from Hai Phong to Hanoi


Figure 3.12. IRI index of a road section from Hai Phong to Hanoi


The IRI index on the Hanoi - Hai Phong expressway from Hai Phong to Hanoi has an average IRI index of 1.34 (Index measured on RoadLabPro software)


Comment: Hanoi Hai Phong Expressway is built with a speed level of 120

km/h, asphalt concrete road surface. Therefore, according to TCVN 8865 - 2011 table 3, the requirement for the quality of the road surface flatness according to IRI of the road in operation is IRI < 2. Here, the IRI index measured in both directions is 0.92 and 1.34 respectively, so the Hanoi - Hai Phong expressway meets the requirements set out in the standard.


CONCLUSION AND RECOMMENDATIONS

1. Conclusion


Topic "Research on the application of utility software of smart phones"

“A study to assess traffic noise and road surface IRI” has focused

The study has solved the main contents of the research objectives and drawn some conclusions of scientific and practical significance as follows:

Regarding traffic noise, noise measurements were conducted through software and smartphones at Cau Giay intersection and Nguyen Khanh Toan - Dao Tan intersection. The results showed that the noise did not exceed the standard noise threshold of 75 dB.


At Cau Giay intersection, noise levels on Mondays, Tuesdays, Wednesdays, and Saturdays are significantly higher than on other days of the week, ranging from 70dB to 74dB. On Thursdays and Fridays, noise levels seem to decrease to only about 6468dB, and Sundays are the lowest at 6567dB. Noise levels are highest between 9am and 9:10am and between 5pm and 17:00 and 17:30, and lowest between 3pm and 3pm.

At the Nguyen Khanh Toan – Dao Tan intersection, most of the time periods of the weekdays have a small difference in noise from 66dB – 73dB, only on Friday and Sunday the noise is lower than other days, only from 58dB – 69dB. The noise has the highest value at 7:20 – 7:30 then gradually decreases and then increases again at rush hour from 17:20 – 17:30.

For IRI index:

When measured with the same phone (same position mounted on the vehicle), running at the same time

one velocity, the IRI value measured between different times has no fluctuation

many. Acceptable error.

There is a difference between the measured values ​​of the devices placed at different positions on the vehicle, but it is not large.

There is not much difference in IRI value between the two lanes Nguyen Van Huyen – Cau Giay and Cau Giay – Nguyen Van Huyen.

The IRI value depends a lot on the vehicle speed. Therefore, when measuring IRI, it is necessary to measure at a fixed standard speed.

When using a motorbike, it is impossible to measure the IRI value using software and phones because the IRI measurement results are very large (because the motorbike's shock absorbers are not guaranteed and suitable for measurement) and are very scattered between different measurements.

IRI measurement results for sections on provincial road 334 - Van Don district and Hanoi - Hai Phong expressway show:


On the provincial road

334 – Van Don district overall index

IRI

on the entire provincial road 334 - Van Don district (including the road to the port and the road to the airport) is within the allowable threshold of 3 ≤ IRI < 5, however, during the measurement process, there were a few points with IRI index > 5 due to the road surface having many potholes, some potholes, wheel ruts, etc.

Hanoi - Hai Phong Expressway is built with a speed level of 120 km/h, asphalt concrete road surface. Therefore, according to TCVN 8865 - 2011 table 3, the requirement for the quality of road surface flatness according to IRI of the road in operation is IRI

< 2. Here, the IRI index measured in both directions is 0.92 and 1.34 respectively, so the Hanoi - Hai Phong expressway meets the requirements according to the set standards.


Nowadays, along with the development of society, many factories have sprung up.

rapidly, means of transport also increased significantly, business establishments

Manufacturing and service businesses have also developed equally. Along with that development is the problem of environmental pollution, air pollution, water pollution, and especially pollution.

infected

noise. On the other hand the devices

mobile as

smartphones and tablets today

more and more popular and attached to people. All of these devices support the function of receiving and processing audio signals. From there, we can take advantage of these utilities to build software to measure and determine noise levels in one place with the hope of

hope is possible

replace

for device

specialized to a certain extent

Building a correlation chart between traffic volume and noise in urban traffic areas is very important. On that basis, relevant ministries and branches will issue circulars on noise to regulate noise levels.


noise in areas where people live, work and operate, to reduce

reduce noise pollution

noise, at the same time this is also an opportunity

basis

industries

traffic, construction research, finding measures to reduce noise pollution.

2. Recommendations

Through the research and analysis in the above sections, the thesis would like to propose to the Transport sector to serve the assessment and have solutions to improve road surface flatness and reduce traffic noise pollution.

For traffic noise:

Nowadays, along with the development of society, many factories have sprung up.

rapidly, means of transport also increased significantly, business establishments

Manufacturing and service businesses have also developed equally. Along with that development is the problem of environmental pollution, air pollution, water pollution, and especially pollution.

infected

noise. On the other hand the devices

mobile as

smartphones and tablets today

more and more popular and attached to people. All of these devices support the function of receiving and processing audio signals. From there, we can take advantage of these utilities to build software to measure and determine noise levels in one place with the hope of

hope is possible

replace

for device

specialized to a certain extent

The construction of a correlation chart between traffic volume and noise in urban traffic areas is of great significance. On that basis, relevant ministries and branches will issue circulars on noise to regulate noise levels in areas where people live, work and operate, in order to reduce noise.

reduce noise pollution

noise, at the same time this is also an opportunity

basis

industries


traffic, construction research, finding measures to reduce noise pollution.

The muscles

Authorities consider proposed measures

thesis statement,

On that basis, research, supplement and amend to suit the conditions of each area to both solve traffic congestion and minimize the harmful effects of noise on people's health.

Propose legal regulations to punish vehicles that make excessive noise such as those with large exhausts, air horns, etc.

Prohibit vehicles from honking while driving on the street, especially container trucks, oil tankers, buses, etc.

Solving traffic noise is a difficult problem that countries around the world are struggling with, so through this thesis, we hope to contribute a part of the solution.

strength to

contribute to solving noise pollution

traffic noise

current pain

For road surface flatness:

Traffic is always of great importance, to help traffic be convenient, an indispensable factor is the quality of the road surface. The quality of the road surface is closely related to the smoothness, speed, fuel consumption and machine wear of cars running on the road. Evaluating the quality of the road surface is related to the

degree requirements

flatness of the road surface.

flat high road

help improve high service capacity.

of the path to efficiency

economy will increase

In the world as well as in Vietnam today, there are many methods to assess flatness, from classical methods such as a 3-meter ruler.


meters to modern methods such as flatness assessment through indexes.

degree

crazy

rugged

international

IRI. Each method has

advantages and disadvantages, although

However, to suit the trend as well as practical requirements is to evaluate in a way

fast and accurate

flatness of major roads, from

that of

In order to take timely remedial measures to minimize the decline in road service capacity, the evaluation method through the IRI index is preferred.

The RoadLabPro software installed on smartphones can be considered as a

quick solution with speed

acceptable accuracy to

facial IRI measurement

However, research is needed to evaluate the correlation between this measurement method and traditional measurement methods.

Local leaders, local agencies and specialized transport units need to pay more attention to the flatness of the road surface from the design and construction stages to the road management and exploitation stages.

The Provincial People's Committee and local industry leaders need to determine and evaluate the flatness of the entire network of National Highways and Provincial Roads in the locality.

desk from

that offers solutions to improve the

flat fit

specific case

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