Wiltshire Police are appealing for witnesses after an altercation between two motorists at the junction with Cricklade Road and Thamesdown Drive.
The incident happened around 11.20am on Wednesday 30 May and involved two cars – a VW and Vauxhall.
PC Paul Harrison said: “I would like to speak to anyone who may have seen or heard something suspicious in this area at this time.
“Also, if you were driving and managed to capture the incident on your dash cam, please contact me.”
If you can help with our enquiries please contact PC Paul Harrison on 101 or anonymously, via Crimestoppers, on 0800 555 111.
