Two men had to be cut free from the wreckage of an accident involving a Ford Transit van and a Vauxhall Zafira.
One of the casualties, a man in his sixties, was treated for leg and chest injuries at the scene.
Both men were taken to hospital for further treatment - one to Addenbrooke's in Cambridge and the other to Broomfield Hospital.
The collision happened at around 4pm on Tuesday May 27 on the B184 Dunmow Road, between Mill End to Monk Street, and left one man trapped in each vehicle.
Fire crews, two ambulances and critical care paramedics from the East Anglian and Herts Air Ambulance services attended the incident.
The road was closed in both directions for four hours while firefighters from Dunmow and Saffron Walden used three sets of cutting equipment to free the men.
The first man was released at around 5.19pm and the second at 5.43pm and both were then left in the care of East of England Ambulance service.
An Essex Police spokesman has confirmed that one of the casualties has been reported for a motoring offence which is now being investigated.