Since the level of urbanization can vary from zero to 100, only as the level of urbanization, increases the potential to urbanize faster decreases. According to one United Nations study, urbanization follows a logistic growth model. This means that in the beginning when the total population lives in rural areas, urbanization level increases at a slower pace but as the level of urbanization rises, the rate of urbanization also rises. A point comes when the population observes the highest speed of urbanization. Beyond this point, although the level of urbanization may continue to rise further, but the speed of urbanization starts decreasing.
At some level below 100 percent, urbanization stops increasing further. As the level of urbanization increases, a similar amount of rural-to-urban migration would result in a smaller speed of urbanization. One cannot expect a highly urbanized country with a level of urbanization above 80 percent to be urbanizing at the same speed as a lowly urbanized country with a level of urbanization of 5-10 percent.
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