Appian Way（Italy）
By Takashi
This page which is based on the information from 'THE UNIVERSE(THE SKY)=SORA' is made by HONO who is one of the fellows of THE UNIVERSE(THE SKY)=SORA.
Appian Way(Italy)
http://sora.ishikami.jp/image_dir/index.php?id=20060106162717
http://sora.ishikami.jp/image_dir/images/2006/20060106162717.jpg
Roman road system had been completed 800 years earlier than the time in which it was on stage in the documents made in sixth century.
It is estimated that the total extension of the roads which were stretched around like a mesh extended from 15,000 km to 20,000 km even in north Africa.
Among them, Appian Way is the road which was paved with stone pavement whose length is as long as 750 km from Rome.
Both sides of a part of the road are made up with the thick fences which were made by the pile of the small thin bricks and they continue endlessly.
If we saw the stone pavements and fences, we could imagine how vast number of stones and bricks were used.
It can not be a work of man.
From Roman highway
https://en.wikipedia.org/wiki/Roman_roads
https://upload.wikimedia.org/wikipedia/commons/thumb/8/8c/PompeiiStreet.jpg/500px-PompeiiStreet.jpg
A Roman street in Pompeii
The standard Roman road width was 4m and it was the width in which two carriages were able to pass through.
The sidewalks of 3m width were made on both the sides of the main road.
The part of the roadway was dug down up to around 2m depth and the roadbed was made up with the three-layer structure.
The subbase course was made up with the big stones, the middle one was made up with middle-sized stones and base one was made up with the mixed material of clay and gravel.
Roman highways were designed so that they would become the straight lines as much as possible by making the cross-links , tunnels and opencuts without going by roundabout routes even though there were valleys, mountains and rocky areas.
They had the technology by which they were able to make the roads in such the mountain pass whose height was as high as 2500 m as Great St Bernard Pass.
What was more, they made the tilt of the road keep within 8 to 9 degree by making the best of land bridges and arch ones.
Therefore they were able to relatively pass through the valleys and mountain passes in the short time.
http://slicer93.mbsrv.net/88-1007.html