<p>Roadways are one of the most important infrastructures of any nation. They play pivotal role in sustainable and inclusive economic development of a nation. The exposure of roads to daily and seasonal extreme temperatures, rains and repeated vehicular loads leads to damage in the structure. Moreover, overweight vehicles affect the fatigue life of roads adversely by increasing the stress on the road structures. Road fatigue is one of the major concerns as it accumulates and leads to severe damage and premature deterioration of the structure of the road. Mostly every country has strict rules and regulations on permissible limits of Gross Vehicle Weight for vehicles running on road, overloading of vehicles is still a global concern. The notion of Weigh in Motion (WIM) is an efficient way to ensure optimal weight enforcement operations by assessing the dynamic vehicular weight. This paper aims to recount the evolution of WIM system from the discovery of a need to state of the art. It also presents a simple cost-effective proposition of weight sensing subsystem design for WIM system based on optical fiber’s macro bending phenomenon as an alternative to traditional bending plate, strain gauges, piezoelectric or complex Fiber Bragg’s Grating Sensors. The linear relationship between the attenuation of light and applied weight makes the proposed weight sensing subsystem at par with the field proven existing WIM systems.</p>