The Computer Is Not Always Right.

An 80-year-old German motorist has obediently followed his navigation system all the way into a huge pile of sand, abrubtly bringing his trip to an end.

The motorist ignored a motorway "closed for construction" sign and crashed his Mercedes into a pile of sand further down the road, police have said.

"The driver was following the orders from his navigation system and even though there was a sufficient number of warnings and barricades, he continued his journey into the construction site," a police spokeswoman has said.

"His trip finally ended when he wound up crashing into a pile of sand," she added.

The driver and his wife escaped uninjured from the collision, which occurred on a motorway near Hamburg.