Tayside police are appealing for witnesses after the mucky mixer driver indecently exposed himself on Tuesday morning.
The woman was walking to work in the city centre when the cement pervert struck.
As she went to cross the road a man driving a yellow coloured cement mixer slowed down and indecently exposed himself.
The vehicle continued towards a roundabout then travelled back, passing the woman again.
The man responsible was wearing a red coloured top.