Driving from the South West of England (i.e. Devon, Cornwall, Somerset, Bristol, Gloucester, etc), you use the M5.
Driving from the South East of England (i.e. London, etc), you use the M40.
Driving from the North West of England (i.e. Manchester, Liverpool, Cumbria, Staffordshire) you use the M6.
The M6, M42 and M5 all join up to make a ring of Motorways around Birmingham - a bit like the M25 in London. The Northern section of this (M6) can get very congested and is in fact one of the busiest streches of road in Europe! They are shortly to open the Birmingham Northern Relief Road (M6 Toll) which is the UK's first Toll Road. What effect this will have on the congestion remains to be seen!

