There are six lanes of heavy traffic outside Lilly's boutique flower shop in Bayswater, a noisy and dangerous barrier for any person who might want to cross the road to buy one of her bouquets.

A 22-year veteran of the shopping strip (the council even named the walkway next to her shop Lilly's Lane in her honour), Lilly has witnessed pedestrians being hit by cars on the road and even by cyclists who prefer to barrel down the sloping footpath than mix it with traffic.

"It's dangerous to cross the road … and to leave the shop, I tell my customers to be careful," she said.

It is for these reasons she thinks the plan to narrow Mountain Highway from six to four lanes is a good one, despite protests from the RACV that it will inevitably choke traffic.