However, beyond this basic difference between Monday-Friday, Saturday and Sunday, the intrapersonal variability of travel behaviour (including activity sequence) is not explained at all by systematic day-to-day variability, i.e. the alternation of days during the working week or during the weekend.
Moreover, we investigate to what extent systematic day-to-day variability influences intrapersonal variability.
Systematic day-to-day variability is shown to have an extremely low share in intrapersonal variability.
The latter is not explained at all by the systematic day-to-day variability.
The global picture is both that intrapersonal variability is large and that systematic day-to-day variability is marginal.
The global picture is that intrapersonal variability is large while systematic day-to-day variability is marginal.
Furthermore, intrapersonal variability (WPSS) is small and within that the systematic day-to-day variability (BDSS) is even smaller (roughly between 1 % and 9 %).
As regards the breakdown of within person variability (WPSS) into between-day (systematic day-to-day) and within-day variability, we see that the systematic day-to-day variability (BDSS) has an even lower share of WPSS when compared to the number of trips.
A further breakdown of within person variability (WPSS) into between-day (systematic day-to-day) and within-day variability shows that the systematic day-to-day variability (BDSS) has an extremely low share of WPSS (about 5%% for the Monday-Sunday period).
Since 1995 WUT Local Analysis Centre, one of the 11 Local Analysis Centres acting in Europe, has started the systematic day-to-day processing of a selected number of European sites in the frame of the EUREF network.
With respect to the breakdown of intrapersonal variability (WPSS), the share of systematic day-to-day variability BDSS is again in the minority (less than 20%%), however, with significant differences when considering various periods in the week.
