What do green and blue colors represent in navigation?

[Ria]

In navigation systems, green indicates smooth traffic flow on the road segment. Solid blue lines represent routes with no traffic information available, while dashed blue lines indicate internal roads (including non-navigable routes). Dark red signifies severe congestion, red shows congestion, yellow denotes slow-moving traffic, and gray dashed lines represent impassable roads. Additional information: An automotive navigation system primarily consists of a navigation host unit and a display terminal. The built-in GPS antenna receives data signals from at least 3 out of 24 GPS satellites orbiting the Earth to determine the vehicle's current position. By matching the GPS-derived coordinates with digital map data, the navigation host precisely locates the vehicle on the electronic map.