Eyewitnesses said the Range Rover overturned and that they helped Prince Philip out of the vehicle, the BBC reported.
The Duke, 97, was driving the auto but was not injured in the collision.
Norfolk County Council was already due to discuss safety issues on the road - described as a "rat run" by one local - before the crash took place. Norfolk Police attended the scene.
Sky's royal commentator, Alastair Bruce, said the duke is getting over "what must have been an incredible shock".
"He stood up and was unharmed but was obviously very shocked".
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Prince Philip in a auto at an earlier date. He added: "It was frightening to see a powerful vehicle rolling like that". Both tests came back as negative. "He had other things on his mind, I'm sure".
Prince Philip and Queen Elizabeth both insist that they are in excellent health, but this accident could be proof that the royal couple should consider hiring drivers instead.
The 97-year-old Duke of Edinburgh was thankfully unharmed in the incident, however, two people in the other vehicle were treated for minor injuries.
The duke saw a doctor as a precaution.
Older drivers often self restrict their driving by not driving at night and only driving on familiar roads. Though increasingly out of the range of journalists and photographers-he even skipped the obligatory Christmas church service on December 25-he's kept up his private duties of being in charge of the royal family's private estates.