I'd heard the term "forced road" used in City Hall transportation meetings before. Since it was in the context of "Goulbourn forced road"--i.e. someplace I didn't expect to find myself anywhere soon--I didn't pay the term too much attention.
Then the other day I heard a more recent--and local--reference to the term regarding Richmond Road. I looked it up, and didn't find it in any online dictionary.
I did a google search and had to dig around. Apparently it's primarily a Canadian/Ontario term.
I was quite pleased with myself when the definition I provided was accepted by Urban Dictionary.
I was even more amused by the mugs, t-shirts, coasters and other "forced road" souvenirs you can buy. They have an interesting software that displays the word and definition on the product as though it were a picture, with the text curving with the folds.
Not sure what a forced road actually is? Duh, look it up!