Hi @neharikas, according to the OSM wiki (https://wiki.openstreetmap.org/wiki/Tag:highway=tertiary) tertiary roads are for roads connecting local settlements/villages/hamlets.

The true purpose of these roads is to provide access to the various shops present. So giving them tertiary classification wouldn't be appropriate. You can see the road isn't continued over a long distance.

I had a discussion on matrix with OSM contributors and they informed me about Frontage Roads (https://wiki.openstreetmap.org/wiki/Frontage_road) which seem to best define the purpose of these roads.