Navigation system with traffic estimation using pipeline scheme mechanism and method of operation thereof

A method of operation of a navigation system comprising:

• selecting a road segment from a road network;
• generating a start window having a start window range and an end window having an end window range for the road segment;
• scaling the start window range;
• scaling the end window range;
• calculating a start window traffic speed within the start window range;
• calculating an end window traffic speed within the end window range;
• and
• estimating a traffic flow of the road segment based on the start window traffic speed and the end window traffic speed for displaying on a device.

A navigation system comprising:

• a road segment selector module for selecting a road segment from a road network;
• a window generator module, coupled to the road segment selector module, for generating a start window and an end window for the road segment;
• a start window calculator module, coupled to the window generator module, for calculating a start window traffic speed for the start window;
• an end window calculator module, coupled to the window generator module, for calculating an end window traffic speed for the end window;
• and
• a traffic flow estimator module, coupled to the start window calculator module, for estimating a traffic flow of the road segment based on the start window traffic speed and the end window traffic speed for displaying on a device.