M4 motorway not signed, European route E30 includes most of the M4. The M4 has two sections of smart motorway. The one between junctions 19 (M32) and 20 (M5) north of Bristol has variable speed limits and a part-time hard-shoulder. Completion was in summer 2014. The section between junctions 24 and 29 in Newport has variable speed limits. In 2010 it was announced that a smart motorway would be constructed between junctions 3 and 12, with work starting in Autumn 2018. This will be the longest smart motorway scheme in the United Kingdom, with a length of 51km (32 miles). Work is
M4 Western Motorway The first main road west from Sydney was the Great Western Highway, shown above in orange. The County of Cumberland planning scheme provided for a modified route west, much of which was later built as the M4 motorway. At present, the NSW Government proposes to complete the motorway by means of an M4 East tunnel as far east as Wattle Street, with provision for a future tunnel extension to the Anzac Bridge at Victoria Road and the 'new M5' at St Peters. M4 Western Motorway The M4 Western Motorway (also known as the M4 Motorway or simply M4) is a