These are taken with a DSLR and long exposure, usually about 30sec, but you can adapt more basic digicams to work too 
M40 near Warwick
M6 between Corley Services and J3
Between Gibbet Hill, Kenilworth Road & A46 Coventry-M40
Between Gibbet Hill, Kenilworth Road & A46 Coventry-M40
Between Gibbet Hill, Kenilworth Road & A46 Coventry-M40
A45 facing Coventry. Behind me goes to M45 and Rugby