Fromnode
It's the starting point of a street
Street
A street is a segment of a road, or of an avenue, or of an highway, etc.
It is uniquely identified by the starting node (fromnode) and the street identifier (streetIdno).
A generic set of streets can be indicated as corridor.
The concept of corridor maps any type of road related to the common user experience (a road, an avenue, an highway, etc.).
In the figure, two corridors: the Red Avenue and the Blu Road.
Speed
The average speed measured on a specific street, expressed in meters per second (m/s).