Hindrance or help? Are sat navs causing more trouble than they're worth?

M.Brodie / Alamy

Since the introduction of satellite navigation in the 1990s, road maps seem to have faded into the depths of history.

These days, the majority of drivers – including long-distance truck drivers – rely on spoken directions from a robotic device to reach their destination. But they're not always accurate and sometimes they're a hazard.