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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The cyclist said the victory was as sweet as his first win as he became the first Briton to win the race three times.
Local police confirmed the explosion, which occurred near Nuremberg.
Temperatures slide a couple of degrees