Up here - I can't quite vouch that the usage is the same in Melbourne or indeed other parts - a laneway is an urban right-of-way for anything other than motorised traffic, i.e. an alley for pedestrians and cyclists. From memory, the Melbourne version allows access for service and delivery vehicles but not for through traffic.
"In the cold months, the city (Melbourne) beckons with hip boutiques, stylish eateries and blockbuster exhibitions, all neatly positioned on its easily navigable grid of streets and laneways." - Nellie Blundell, Frosty, fabulous Melbourne, news.com.au, 23 August 2007.