Improving the
Roadside Environment
To reduce environmental burdens along the road and maintain harmony with the surrounding regions
We are implementing a variety of measures to reduce noise and vibrations along Metropolitan Expressway and improve the atmospheric environment of the surrounding regions.
Noise and vibration measures
Installation of sound insulation walls
Sound insulation walls are installed for the purpose of reducing noise along the road in order to maintain a comfortable living environment.
We are currently working on adopting sound insulation walls to not only reduce noise but also take landscape into account.
Installation of backside sound absorbing plate
The back side sound absorbing plate is a plate installed on the underside (back side) of the viaduct. By installing a sound absorbing plate on the back side, it is possible to reduce the noise from the street reflected on the underside of the viaduct.
Installation of Eco-Safe
Pave
Thanks to its excellent drainage properties, Eco-Safe Pave provides a safe driving environment for customers, even in rainy weather. It uses a small-aggregate porous asphalt mixture for the surface layer and features ultra-low noise levels, reducing road noise by approximately 7 dB compared to conventional high-performance pavement. It also improves vehicle fuel efficiency by 4.5%, thereby reducing CO₂ emissions. Due to its excellent durability, these benefits are sustained over the long term.
Recognized for its outstanding performance, Eco-Safe Pave was awarded the Excellence Prize at the 26th Infrastructure Technology Development Award in 2024.
Implementation of non-joint construction
By eliminating the joints on the road surface, we will realize smooth running without shocks, reduce noise and vibration, and proceed with non-joint construction. After construction, there is no need to repair the joints (replacement of joints), so it is possible to reduce traffic congestion associated with repair work.
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Please avoid overloading because it can damage the roads and cause noise and vibrations
Atmospheric Environment Improvement
Implementation of environmental road pricing discount
Automobile exhaust and other harmful substances have an impact on the atmospheric environment along the Kanagawa No. 1 Yokohane Line.
This pricing discount will help improve the atmospheric environment along the Kanagawa No. 1 Yokohane Line.
In order to improve the environment along the Yokohane Line, we will promote the conversion from the Yokohane Line to the Bayshore Route by discounting the fare for large and oversized vehicles that use the Bayshore Route or Kawasaki Line.
- For details on the environmental road pricing discount, please also refer to the Environmental Road Pricing Discount leaflet.
Other efforts to improve the atmosphere(Metropolitan Expressway website)
