The A30 is closed in both directions, between the B3301 and A3047 near Camborne (west) due to a collision.
Emergency services, including Devon and Cornwall Police are in attendance.
Traffic is being diverted via the ‘old’ A30, in both directions.
Delays are likely on the approach to this closure, with additional journey times also expected on diversion routes.
Further incident information is available from Highways England by visiting our www.trafficengland.com website and travel apps, or via our @HighwaysSWEST regional Twitter feed. Our 24/7 Customer Contact Centre is also available to provide up to the minute information on 03001235000.