What is the duration of the roadside licence suspension for a 2nd offence for an experienced driver?

Answer: A — 21 days

An experienced driver who is convicted of a second offence will face a 21-day roadside licence suspension. It is important to note that an experienced driver is defined as someone who has held a valid driver's licence for at least 2 years but less than 10 years. This means that options B, C and D are incorrect as they either refer to a different length of suspension or are not applicable to experienced drivers.