Cat Jump Road

At Donvale there may be the shortest road on record - Cat Jump Road, just 623’ 9" long. Old Warrandyte Road meets Springvale Road at a very sharp angle. In 1886, some local residents applied for a road to cut this corner, thus avoiding the half mile round the corner and a steep hill in Springvale Road. Steep hills and muddy valleys were serious hazards in horse and cart days.
In discussing the chances of having the proposal agreed to, one man said; "It all depends which way the cat jumps." The phrase stuck and became the name of the new road. Some councillors considered the name to be undignified and were preparing to object when the proclamation of the road came before council. The Shire Secretary, in his wisdom, put the item last on the agenda, so the question was never dealt with and the name remained.
1968 11 DTHS Newsletter from information supplied by Mr. Norman White of Donvale

Cat Jump Road Google Maps 2018

"see which way the cat jumps" (idiomatic) To delay taking action based on the outcome of something else.  Wiktionary