We will see how the traveling speed, economic losses, atmospheric conditions and noise situation will become when traffic jam occurs.
The word, general roads, indicates too large range, so we will see the driving speed in ※DID (Densely Inhabited District).
※DID (Densely Inhabited District): A district that the population of it is over 5000 a square kilometers.
The figure below shows the driving speed in DID at its peak.
As we can notice from the figure below, actually over 40% of cars slow down to 20 km / h or less, which is defined as traffic jam on general roads.
Driving speed at congestion in DID (Densely Inhabited District) [km / h]