From an hourly audit of what vehicles were doing
during the survey period, they were productive, i.e.
in the process of being loaded/unloaded or running
on the road, for only 38% of available hours.
Allowing for safety inspections/maintenance (7%)
and breaks from driving taken on the road (1%),
vehicles were unproductive for 54% of available
time. The figure for time taken as breaks from
driving may seem low but it should be noted that
this relates solely to those breaks taken specifically
on the road and does not include breaks from
driving taken on site, for example while waiting to
be loaded/unloaded. Breaks taken in this way will
be included in the figures for other categories of
vehicle use. The various categories of use are
summarised in Figure 5.