The present study investigates the efficiency of hexagonal steel-wire-mesh reinforcement in the granular layer of unpaved roads through a full-scale field test. Three-test sections were constructed in the widening portion of the Sahol-Kim state highway in Gujarat, India. The first test section was reinforced with geogrid. The second was reinforced with hexagonal steel wire mesh, and the third was left unreinforced for comparison purposes. The test sections were subjected to in situ light weight deflectometer (LWD) tests to determine the in situ elastic modulus. With the addition of geogrid and steel wire mesh in the base layer, the composite elastic modulus of pavement layers increased by factors of 1.10 and 1.32, respectively. Finite element analysis was conducted in PLAXIS 2D to obtain critical vertical compressive strain and service life ratio (SLR) values. A higher SLR value of 1.65 for steel-wire-mesh (SWM) reinforcement indicates its effectiveness in enhancing road durability and confirms its suitability in preventing rutting failure.