FERIC conducted a field study to determine the optimum aggregate thickness for roads traveled primarily by trucks equipped with tire pressure control systems (TPCS). The main objective was to establish if savings during road construction could help justify the cost of TPCS technology. The initial results showed that aggregate thickness could potentially be reduced by more than 28% at the test location. This reduction would result in savings in aggregate costs of at least $4000/km, which could help cover the cost of TPCS.