Abstract: In a traffic simulation in which vehicle models, which simulate vehicles, are moved in a road system model including links, which simulate the smallest segment of roads divided by intersections, etc., and nodes, which simulate the intersections, turning points of the roads, etc., the presence/absence of an entering vehicle model that enters a different link from a link in the road system model via the node is judged; the velocity of the entering vehicle model after entering the different link is calculated on the basis of the density of the vehicle models in the different link after the entering vehicle model has entered the different link; and the calculated velocity is set only for the entering vehicle model that has entered the different link.

Abstract: In a traffic simulation in which vehicle models, which simulate vehicles, are moved in a road system model (40) including links (42), which simulate the smallest segment of roads divided by intersections, etc., and nodes (44), which simulate the intersections, turning points of the roads, etc., the presence/absence of an entering vehicle model that enters a different link (42) from a link (42) in the road system model (40) via the node (44) is judged; the velocity of the entering vehicle model after entering the different link (42) is calculated on the basis of the density of the vehicle models in the different link (42) after the entering vehicle model has entered the different link (42); and the calculated velocity is set only for the entering vehicle model that has entered the different link (42).