As far as I can see, one end is at the junction of the M1 and M6, and the other is at Walton Avenue in Felixstowe where it meets the A45.
it starts at holland
Very
There is no specific term or concept that Europeans commonly refer to as "a14." It is possible that "a14" refers to something specific in a particular context, but without further information, it is not possible to provide a more specific answer.
a14
yes
It is a 14 sided polygon
190 miles taking this route:Take M42(N), from Bromsgrove, to M6 LONDON at J7A.Take M6 to A14 FELIXSTOWE at the END of the M6 motorway.Take A14 to A11 NORWICH at J38.Take A11 to A47 GREAT YARMOUTH at the junction outside of Norwich.Take A47 to Great Yarmouth.
130 miles taking this route:Take M1 to The SOUTH, towards LONDON, from Leeds, to A14 KETTERING at J19.Take A14 to KETTERING.
65 miles taking this route:Take A605 NORTHAMPTON, from Peterborough, to A14 KETTERING.Take A14 to M6 to The NORTH WEST to COVENTRY.Take M6 to COVENTRY.
Birmingham, West Midlands to Cambridge, Cambridgeshire is 95 miles taking this route:Take M6 LONDON, from Birmingham, to A14 FELIXSTOWE.Take A14 to Cambridge.
c23
2160 degrees