Road information providing system and road information providing method

A road information providing method to be performed by a computer, the method comprising:

• a first traffic state recognition step of recognizing a first traffic state, the first traffic state being a traffic state of first-type movable bodies in a predetermined area;
• a second traffic state recognition step of recognizing a second traffic state, the second traffic state being a traffic state of second-type movable bodies in the predetermined area, the second-type movable bodies being smaller in size than the first-type movable bodies;
• a specific road area extraction step of extracting, as a specific road area, a road area that satisfies traffic determination conditions, the traffic determination conditions including a determination condition that it is recognized from the first traffic state that a traffic volume of the first-type movable bodies has decreased from a first reference amount by a first predetermined amount or more and a determination condition that it is recognized from the second traffic state that the second-type movable body is traveling;
• and
• a traveling obstruction information providing step of providing traveling obstruction information serving as notification that an event has occurred which obstructs traveling of the first-type movable bodies in the specific road area.