Pavement maintenance is the major activity for keeping any highway in good condition, especially for flexible pavement, and for planning future maintenance requirements, prediction of pavement distresses plays a major role. In India, cracking in flexible pavement is one of the major distresses, which is mainly caused by low pavement strength and heavy traffic loading, apart from other factors such as age, materials, environment, and construction quality. This paper is the theoretical study and analysis of the impact of traffic and pavement strength on cracking of flexible pavement from an Indian highways perspective. The deterioration equations of flexible pavement used in this study for analysis are deterioration models of HDM-4, Indian models, and MEPDG. The first two models are empirical, based on historical pavement distress data, whereas the third model is a mechanistic-empirical model based on material properties, stress/strain in pavement layers, and historical pavement distress data.