This map shows the section of the M4 that is frequently congested, and that would be bypassed if plans for a 14-mile relief road went ahead.
The Welsh government has long pushed for a relief road in this area. Plans were shelved in 2009 after the projected cost of the project rose to £1 billion.
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Cold and sunny for most, increasingly cloudy from the west. Cloud and wind spreading from the west of UK.
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A 21-gun salute was first sounded in the capital, Havana, as Castro's ashes were taken to the cemetery in eastern Cuba.