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Hazard anticipation of young novice drivers - SWOV

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cassette or CD-player. Klauer et al. (2006) divided the population <strong>of</strong> <strong>drivers</strong><br />

in the 100-Car Naturalistic driving study in a group <strong>of</strong> <strong>drivers</strong> that had a<br />

high involvement in crashes or near crashes and a group <strong>of</strong> <strong>drivers</strong> that had a<br />

low involvement in crashes or near crashes. The average involvement was<br />

3.6 crashes or near crashes. The mean age <strong>of</strong> the high involvement <strong>drivers</strong><br />

was 30 and the mean age <strong>of</strong> the low involvement <strong>drivers</strong> was 37. This<br />

difference was significant. Figure 2.7 shows the frequencies <strong>of</strong> safety-critical<br />

events due to distraction <strong>of</strong> high involvement <strong>drivers</strong> and low involvement<br />

<strong>drivers</strong> per age group. The <strong>young</strong>est <strong>drivers</strong> not only had the most safetycritical<br />

events, but also more <strong>of</strong>ten belonged to the group <strong>of</strong> high<br />

involvement <strong>drivers</strong>.<br />

120<br />

100<br />

High involvement<br />

Frequency <strong>of</strong> Events<br />

80<br />

60<br />

40<br />

Low Involvement<br />

20<br />

0<br />

18-20 21-24 25-34 35-44 45-54 55+<br />

Age groups<br />

Figure 2.7. Number <strong>of</strong> safety-critical events <strong>of</strong> high involvement <strong>drivers</strong> and low<br />

involvement <strong>drivers</strong> per age group (adapted from Klauer et al., 2006).<br />

A possible explanation for the high involvement <strong>of</strong> <strong>young</strong> <strong>drivers</strong> in<br />

distraction related crashes is that they more <strong>of</strong>ten engage in secondary tasks<br />

than older <strong>drivers</strong>, especially with cell phones and smart phones. A second<br />

explanation could be that as the basic tasks for operating the vehicle are not<br />

yet fully mastered (not yet completely executed at the procedural stage) and<br />

still require mental workload, the disruptive effect <strong>of</strong> secondary tasks is<br />

greater for <strong>novice</strong> <strong>drivers</strong> than for experienced <strong>drivers</strong>. A third possible<br />

explanation could be that <strong>novice</strong> <strong>drivers</strong> lack the skills to assess whether the<br />

62

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