A woman was trapped in her car as it overturned in Burgh Heath Road in Epsom.
The car flipped onto its roof near College Road near the area with roadworks.
Nicola Burress, Surrey police, said: "The female driver of the grey Citroen Xsara was trapped following the collision and is still being treated at the scene for her injuries.
"The road remains closed in both directions while emergency services, including fire and ambulance and fire crews, deal with the incident."
Anyone with any information is asked to contact Surrey Police on 101, quoting incident reference P16273379.
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