An 18-year-old man has been arrested on suspicion of murdering Leonne Weeks, 16, who was found dead on a path in Rotherham.
The M4 motorway has reopened in both directions a week after it was closed for emergency repair works.
The road was shut last Friday between junctions 2 and 3 after cracks were discovered on a bridge.
Engineers have completed the repair work and it was opened to the traffic around 5.30am.
A Highways Agency spokesman said: "An exceptionally delicate and difficult operation to repair cracks in the Boston Manor Viaduct on the M4 has been successful and the motorway has now reopened between junctions 2 and 3 to all cars."
The M4 is expected to be one of the busiest routes during the Olympic Games, and hundreds of athletes are due to start arriving at Heathrow from Monday.
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A man has been fined £1,800 for flying drones over Parliament, near Buckingham Palace and over football stadiums.
Government to investigate after some restaurants accused of withholding tips
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