An important indicator of road condition is the measure of its roughness. The WorldBank (WB) established the International Road Roughness Index (IRI) as a standard to measureroad roughness. Although many types of road inspection vehicles can measure IRI, a typical roadinspection vehicle equipped with multiple sensors can cost up to several millions of pesos.Developing countries find this steep price to be a challenge for the monitoring of their roadnetworks. Therefore, this paper aims to propose an alternative method to measure roughnessusing smartphones and Geographic Information System (GIS) for the Philippine setting. Theproposed methodology will be based on data collected by smartphones which will then beprocessed using GIS to come up with approximate road roughness measurements. The results ofthe proposed methodology will be compared with the existing IRI standard established by theWorld Bank to measure road roughness of different types of roads. In addition, the paper will tryto look into the developed methodology’s application and integration to road network planning inthe Philippines.