Hey Les,
We invented the bloody language and tarmacked is how you spell it.
Tarmac and tarmacked
And while I'm on.....
Being a Civil Engineer, asphalt is the top layer of a tarmacked road - often termed HMA (Hot mixed asphalt). It is generally a thin layer due to the aggregate (stone) size, which gives the smooth running surface.
Tarmacadam roads originally consisted of tar binding the stone together and was initially used by John McAdam in Scotland - hence the name.
Tar has generally been replaced by bitumen these days and hence the term bitumen roads.
There endeth the lesson.
I'd give you a call to discuss further, but remembered you ain't got phones yet