A woman was fatally hit by a van after she chased her dog on to a motorway, police believe.
Patricia Connors, 66, was pronounced dead at the scene after being struck on the M4 near Cardiff by a Ford Transit at around 6.15pm on Friday, officers said.
The great-grandmother, from Cardiff, was trying to rescue her dog on the busy road when both were hit and killed by a Ford Transit Van.
Her family released a statement saying they were "heartbroken" over her death.
The statement said: "The family of Patricia Joyce Connors are heartbroken trying to come to terms with a tragic accident that has taken a loving Mum, Grandmother and great-grandmother."
South Wales Police believe she followed her dog after it ran into the road. The force appealed for witnesses to come forward.
The motorway was closed for five hours while police investigated.
Anyone with information should contact 101.