A motorhome has caught alight on the M1 motorway north of Sydney causing significant traffic delays.
Emergency services arrived on the M1 motorway north of Ku-ring-gai Chase Road at Mt Colah just after 11.30am.
A campervan towing a small car was on fire, billowing thick, black smoke into the area.
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Fire and Rescue NSW said flames spread to a nearby embankment.
Two people in the vehicle escaped the blaze.
A 60-year-old man was treated for smoke inhalation.
The fire has been contained but has blocked traffic travelling in both directions.
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There are now significant traffic delays on the M1 motorway with motorists advised to allow extra travel time.