Monitoring and Mapping of Traffic Noise and Air Pollution of Arterial Roads in Urban Areas :
A Decision-Assisting Framework for Impact Assessment and Mitigation Measures
The WBI Noise maps shown On www.benoiseaware.kfupm.edu.sa are generated utilizing different scenarios:
Noise - Scenario A
The whole city (all-objects) showing only the resulting traffic noise of roads, particularly major ones. Diurnal Patterns (DP) of traffic in major roads as per the measured Traffic Counts/Volume and averaged over three working days.
Noise - Scenario B
Same as Scenario A, but with heavy traffic made time-restricted only in roads Class Type C00 and C01. This means that no heavy traffic is allowed during three time periods: 5-8 in the morning, 12-15, afternoon and 17-20 at night. (i.e. HT% is set to zeros during these time periods) .
Noise - Scenario C
Same as Scenario A but with the use of Porous Asphalt in roads class type C00 and C01 (only) instead of smooth mastix asphalt. Porous Asphalt with open-pore asphalt layer containing at least 15% of voids when new.
Noise - DIFFERENCE GRID: Scenario A - Scenario B
The generated map indicates the impact of Time-Restricted Heavy Traffic strategy in reducing traffic noise. Results: Ld, Ln and Lden: level decrease is mostly around 1.0 dB(A) inside the road section, up to 1.5 dB(A), only a few >1.5 dB. Le shows higher decrease up to 3.0 dB(A) due to more impact of reduced HT% on overall noise distinct locations.
Noise - DIFFERENCE GRID: Scenario A - Scenario C
The generated map indicates the impact of changing the Road Type Finish strategy in reducing traffic noise. Results: Noise Levels decrease in the range of 4.0-6.0 dB(A) along major roads.
The whole city (all-objects) showing only the resulting traffic noise of roads, particularly major ones. Diurnal Patterns (DP) of traffic in major roads as per the measured Traffic Counts/Volume and averaged over three working days.
Noise - Scenario B
Same as Scenario A, but with heavy traffic made time-restricted only in roads Class Type C00 and C01. This means that no heavy traffic is allowed during three time periods: 5-8 in the morning, 12-15, afternoon and 17-20 at night. (i.e. HT% is set to zeros during these time periods) .
Noise - Scenario C
Same as Scenario A but with the use of Porous Asphalt in roads class type C00 and C01 (only) instead of smooth mastix asphalt. Porous Asphalt with open-pore asphalt layer containing at least 15% of voids when new.
Noise - DIFFERENCE GRID: Scenario A - Scenario B
The generated map indicates the impact of Time-Restricted Heavy Traffic strategy in reducing traffic noise. Results: Ld, Ln and Lden: level decrease is mostly around 1.0 dB(A) inside the road section, up to 1.5 dB(A), only a few >1.5 dB. Le shows higher decrease up to 3.0 dB(A) due to more impact of reduced HT% on overall noise distinct locations.
Noise - DIFFERENCE GRID: Scenario A - Scenario C
The generated map indicates the impact of changing the Road Type Finish strategy in reducing traffic noise. Results: Noise Levels decrease in the range of 4.0-6.0 dB(A) along major roads.