• 제목/요약/키워드: walkway noise

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Designing Interactive Walkways of Smart Cities in Saudi Arabia

  • Jadi, Amr
    • International Journal of Computer Science & Network Security
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    • 제21권5호
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    • pp.121-128
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    • 2021
  • In this work, a noble walkway approach suitable for Saudi Arabia (SA) towards its aim to develop a wide range of smart cities is considered scientifically. This work intends to minimize the errors at each level by testing the events that take place in the walkway environment. similarly, the minimum requirements to develop a walkway to the additional features to be considered while designing a walkway are discussed in this paper with sensitive areas such as environmental factors, healthcare issues, patients visiting the walkways, etc. The applications of different monitoring devices such as CCTV's, global positioning systems (GPS), etc. are carefully addressed to help the proposed method for improving the monitoring activities of a variety of events that possibly cause problems to a common man. The ultimate goal of this work to ensure a safe and satisfied journey of pedestrians while they come for a walk with all suitable safety measures. The safety measures included in this work are for pollution, noise, temperature, humidity and traffic jams on the roads. To improve the accuracy and to test the proposed approach some polices are defined and will be tested for the consistency of the proposed system. The obtained accuracy of the proposed system is proved to be far better with an accuracy of 93% improvement in the results.

퍼지근사추론을 이용한 보행 서비스수준 산정 (Estimating the Level-Of-Service for Walkways by Using Fuzzy Approximate Reasoning)

  • 김경환;박상훈;김대현
    • 대한토목학회논문집
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    • 제26권2D호
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    • pp.241-250
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    • 2006
  • 보행은 가장 권장되어야 하는 중요한 교통수단임에도 불구하고, 아직까지 구체적인 연구가 미미한 실정이다. 특히, 자동차 위주의 교통계획으로 인하여, 도로시설의 용량분석 및 서비스수준 평가를 위해 제정된 "도로용량편람(HCM)"에서 조차 보행 및 보행공간에 대한 구체적인 분석방법이 제시되어 있지 않고 있다. 그러므로 본 연구는 현재의 보행 서비스수준의 분석 기준인 보행유율에 소음수준과 주변밝기 정도를 추가로 고려하는 보행자가 직접 느끼는 서비스수준을 산정하기 위하여 퍼지근사추론을 사용하였다. 입력변수는 보행유율, 소음수준, 밝기정도를 사용하였으며 주간과 야간으로 나누어 퍼지근사추론 모형을 구축하였다. 구축된 모형의 예측력 분석은 $R^2$와 MAE 그리고 MSE를 사용하였으며 그 값은 주간모형의 경우 각각 0.803, 0.729, 0.735이고 야간모형의 경우 0.893, 0.878, 0.860으로 모형의 설명력이 높음을 보여주고 있다. 본 연구과정에서 야간의 경우 보행유율이 높을수록 밝기정도보다는 소음수준이 보행만족도에 더 큰 영향을 미치는 것을 볼 수 있었다.

도심터널 보행로 안전벽 설치 전후의 미세먼지, 블랙카본, 소음 수준 비교 (Comparative Analysis of Particulate Matter, Black Carbon, and Noise Levels Before and After Installation of a Safety Wall in a Pedestrian Walkway within an Urban Tunnel)

  • 이명호;박종민;강소현;박정연;권태홍;윤충식
    • 한국산업보건학회지
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    • 제34권3호
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    • pp.214-221
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    • 2024
  • Objectives: People using pedestrian walkways within tunnels may be exposed to environmental hazards that can have adverse effects on their health. This study aimed to measure changes in the levels of particulate matter (PM10), black carbon (BC), and noise after the installation of safety walls on pedestrian walkways within tunnels. Methods: Measurements were taken at the entrances on both sides of a tunnel and at the central point, both before and after the installation of pedestrian safety walls. Additionally, measurements were conducted by distinguishing between non-rush hour and rush hour periods to account for variations in the number of vehicles using the tunnel. A SidePak was used for PM10 measurements, an aethalometer for BC, and a sound level meter for noise. Results: PM10 showed the highest concentrations at the center of the tunnel at both pre- and post-installation of safety walls, as well as during rush hour periods. After the installation, the concentration at the center was 31.09 ± 14.02 ㎍/m3 (19.44 ± 8.02% increase). During rush hour, BC concentration reached 2.28 ± 1.55 ㎍/m3, indicating a 26.71 ± 13.19% increase compared to non-rush hour. As for noise, installation of safety walls reduced noise levels about 3 - 6 dB (8.10 ± 3.31% decrease). Conclusions: It was confirmed that installing safety walls on pedestrian walkways within the tunnel can reduce noise levels. However, the interior of a tunnel is a poorly ventilated environment, and exposure levels vary depending on the length of the tunnel. Therefore, the development of safety measures related to this issue is warranted, and further research on harmful substances within the tunnel should be conducted.