Questione giuridica chiave
Whether the indefinite safety withdrawal under Art. 16d LCR was lawful after the failed control drive.
Decisione estratta
The withdrawal was lawful; the failed control drive sufficed to confirm a serious doubt about driving fitness, and Art. 16d LCR is not to be read restrictively.
Motivazione estratta
A safety withdrawal must be ordered whenever the conditions for the licence are no longer met. A control drive is an admissible instructional measure when aptitude is doubtful. The brief collision during a manoeuvre that endangered another vehicle justified interrupting the test and concluding that the appellant had not shown the required driving ability.