Doto Expressway (Shimukappu IC to Tomamu IC to Tokachi Shimizu IC)
The expansion to four lanes is being implemented in response to the decrease in speed observed in the temporary two-lane section due to increased traffic volume, as well as the accident situation.
Shimukappu IC-Tomamu IC
Tomamu IC-Tokachi Shimizu IC
Image of construction for expanding to four lanes
The four-lane project will involve widening the section that currently has two-way traffic (one lane on each side) to four lanes (two lanes on each side).
Businesses that consider the natural environment
The section between Shimukappu IC and Tokachi Shimizu IC, where the four-lane expansion project is underway, boasts a rich natural environment and is home to many valuable species.
To ensure that the construction does not affect valuable wildlife, we will carry out the work in a way that takes the natural environment into consideration, taking into account surveys to understand the current state of the natural environment, monitoring surveys, and the opinions of experts.
Precious creatures that inhabit and thrive in the section under construction for the four-lane expansion.
Mountain Hawk-Eagle and Black Woodpecker
The mountain hawk-eagle is a species of hawk that is designated as endangered.
The black woodpecker is the largest woodpecker in Japan, and is designated as a natural monument, inhabiting Hokkaido and parts of Tohoku.
We will check the habitat status of mountain hawk-eagles and black woodpeckers around the planned construction site, assess whether there will be any impact based on the opinions of experts, and consider countermeasures.
Mountain Hawk-Eagle
Black Woodpecker
Sakhalin taimen and Dolly Varden trout
The Sakhalin taimen is an endangered species, and the Dolly Varden trout is a near-threatened species; both are members of the salmon family.
We will check the habitat status of Sakhalin taimen and Dolly Varden trout in the rivers surrounding the planned construction site and consider measures to prevent any negative impact on the rivers based on the opinions of experts.
Ito (Japanese taimen) *Release after investigation
Dolly Varden trout *Release after survey
Black maple
The black-browed maple is a type of maple that is designated as an endangered species.
We will check the growth conditions around the planned construction site and consider measures to preserve the growing environment based on the opinions of experts.
Mature Japanese maple
Black maple leaves