A man indecently exposed himself to a 19-year-old woman as he drove past her in a cement mixer, police have said.
The woman was walking along Broughty Ferry Road in Dundee at about 0920 BST on Tuesday when the incident happened.
Tayside Police said the yellow cement lorry slowed as the woman crossed the road and the man then indecently exposed himself.
The vehicle continued west towards Eastport roundabout then turned round, passing the woman again.
Police have appealed for witnesses to contact them. They said the man responsible was wearing a red top.