On the distribution of individual daily vehicle driving distances

The vehicle kilometres travelled (VKT) by individual passenger cars vary strongly between days. This is important for electric vehicles since trips larger than the electric range reduce their utility. Here we analyse different distribution functions for the variation in daily VKT with three sets of travel data. In contrast to the literature, no analysed distribution stands out best. We apply our findings for the distribution functions to estimate the number of days per year with driving distance larger than 100 km and find that the distributions differ in their predictions of the number of such days.