Environmentally Friendly Expressway
"Environment Friendly" becomes one of the most important key phrases in our daily life these days. The Hanshin Expressway (HEX) is an urban expressway to sustain people's mobility and the region's economy; meanwhile, the expressway has a negative environmental impact against the local communities where the expressway is running through. The HEX takes its social responsibility to make the region sustainable by taking various environmental measures to minimize negative impact on the local communities.
Noise Reduction Measurement 1
<Noise Barriers and Absorbers>
Noise barriers are installed to alleviate unpleasant noise caused by vehicles passing through HEX. Moreover, noise absorbers are installed on the top of noise barriers to further reduce noise in the highly dense residential areas adjacent to HEX.
Noise Reduction Measurement 2
<High- Performance Pavement>
HEX installs the "High-Performance Pavement." The High-Performance pavement is also called the "High-drainage Pavement" or "Noise-reduction ［Noise-reducing］ Pavement" This pavement has numerous apertures in its subsurface layer that make drainage smoother and contribute to reduce traffic accidents on rainy days. This pavement also reduces noise generated by friction between tires and the road surface.
Surface Flatness Improvement for noise and vibration reduction
Approximately 90% of the total length of the HEX consists of viaducts. Viaduct section are provided with numerous joints on their surfaces. Because of these joints, vehicles passing through the expressway often make heavy noise and vibration. To minimize the noise and vibration at these joints, continuous girders are employed where possible, and existing slabs are connected, thereby extending continuous sections without joints.
Earth Recycling Project
The shield tunneling work for excavation of the Yamatogawa Route generates construction sludge, and we are recycling this sludge for a large-scale public land reclamation project. To enable recycling of the sludge, we have constructed an Earth Recycling Centre on a 7,000-square-meter-site. In this center, sludge undergoes quality improvement, sorting, and solidification. After that the earth will be reused for the Land Reclamation Project. Also, ETC manifest system has been introduced to monitor the transport of the sludge.