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 M4 Western Motorway The M4 Western Motorway (also known as the M4 Motorway or simply M4) is a dual carriageway motorway in western Sydney, New South Wales, Australia. The partially-tolled motorway stretches from in the east, where it connects with the Great Western Highway/Parramatta Road as the A4 to in west, where it continues as the Great Western Highway as the A32. The M4 Western Motorway was formerly known as F4 Western Freeway. It used to be part of the Sydney Metroad 4 until 2013, when the new M4 route designation was proclaimed along the whole motorway. A toll was