Officers are appealing to speak to witnesses following a collision on the M5 at Exeter.
The collision, which involved a motorbike and two cars, occurred at 8.13am on Thursday 23 April on the northbound carriageway between junctions 31 and 30.
The bike rider, a man in his 20s, sustained serious, potentially life-changing injuries and was taken to hospital for treatment.
The M5 was closed at junction 31 whilst the scene was examined by specialist forensic collision investigators.
Police are appealing for any witnesses that have not already been spoken that have information or dash-cam footage, to contact police by calling 101 or via our website, quoting the log 129 23/04/26.

Start and end your day right: South West Water encourages customers to adopt water-efficient routines to protect essential supplies
Pregnant women urged to get flu vaccination ahead of winter
AI helping people reach the right service faster
Energy bill rise highlights importance of support available through Devon’s Crisis and Resilience Fund
More families to be able to access free school meals
Exeter Cathedral First In UK To Be Awarded Accredited Archive Status For Third Time
Drivers urged to take ‘Moor’ care and protect beauty spot wildlife
New solar panels support greener future for East Devon Business Centre
Hard lines for proposed school in Devon’s newest town as local criticism persists
Call for clarity over Royal Marines asbestos exposure claims
Parents in the South West urged to vaccinate children at the right time to protect them and ensure they are ready to thrive at school
South West Water offers free water-saving devices to help customers reduce their use
Battery blaze in Exeter recycling vehicle sparks fresh warning
Temporary lane closure on Bridge Road will remain in place while essential safety work is planned
Police appeal for information following an assault in Exeter
Supporting the Local Economy by Keeping Devon Walking
