Police Scotland is appealing to the public in order to trace two men who stopped to assist a woman on the M9.
The incident happened around 12.40am on Tuesday, October 19, between the Forth Road Bridge Junction and Junction 3 on the M9 northbound.
A 34-year-old woman was assaulted by a man travelling in her car while she was driving at speed.
The woman pulled over following the incident and the man left the car. When she pulled over, the 34-year-old was assisted by two male witnesses, who officers are now eager to trace.
Officers are following a positive line of enquiry.
The female driver sustained a minor head injury, but was able to continue driving.
She was also travelling with her 4-month-old baby, who was also in the car during the attack.
The type of car the two witnesses were driving is unknown.
Police Sergeant Stuart McKissock of Livingston Police Station said: “Thankfully the woman only sustained a minor head injury and was able to leave the area.
“Nevertheless we are eager to trace the two male witnesses who came to the aid of the female driver.
“I would urge anyone who was on the M9 and saw the incident, or knows who the two witnesses may be, to come forward and contact us immediately.”
Those with information can contact Police Scotland on 101 or anonymously through Crimestoppers on 0800 555 111.