A 92-year-old man found himself on his mobility scooter on a busy dual carriageway near Crawley, West Sussex, and had to be rescued by local police.
PC Katie Breeds said: "A passing motorist stopped us at around 12.45pm on Friday and told us about the man as he was very concerned for his safety.
"It's a busy 70mph dual carriageway and we are grateful to him for stopping.
We caught up with the man heading away from the M23 on the A2011. He was very confused and really didn't know where he was.
"We sat him in the back of our police car and waited for a colleague in a van to collect the mobility scooter and then we delivered scooter and driver back home to his warden-assisted accommodation in Crawley."
The unnamed man is now recovering from his ordeal at home.