Insp John Thompson from Central Motorway Police Group Appeals said they would like to hear from anyone with information.
A bus driver who broke down on the M5 has today been sent to prison after failing a breath test. A lorry driver and bus passenger died.
West Midlands Police are continuing to investigate a collision on the M5 in the West Midlands.
The driver of a lorry that crashed into the rear of a bus carrying a party of fruit-pickers on the M5 near Birmingham has died in hospital.