25 January 2011, 11:25 | Updated: 10 February 2011, 12:21
Thames Valley Police are appealing for witnesses following an incident near The Cricketers Pub in Oldbrook, Milton Keynes, on 11 January.
An 18-year-old woman was walking home at around 4pm on Oldbrook Boulevard, near The Cricketers Pub, when a blue car, which was described as low to the ground, mounted the curb and stopped in front of the woman.
A man was in the passenger seat and a woman was driving. The man asked for directions and then exposed himself in front of the woman, who then ran off.
Anyone with any information should contact 0845 8 505 505. If you do not want to speak to the police, call the Crimestoppers charity anonymously on 0800 555 111. You can also give information to the police in person by visiting any police station.