@Saikat_Maiti Not related to main highways as described in your campaign, but I’ve come across new information suggesting that borderlines cases (e.g., <=4 meters) do not need to use a lanes=* tag regardless of markings on the ground.
Instead, it would be recommended to use lanes_marking=no + width=X + source:width=estimated.
For more details, you can refer to this global voting topic at: When should the 'lanes=*' tag be applied?