Two posties show the old orange (right) and the new bright yellow look for their motorbikes and uniforms. (ABC News)
Australia Post says motorcycle posties will be much easier to see from today.
After a successful trial, posties will take to the roads and footpaths in new fluoro yellow high-visibility uniforms and enhancements for their bikes.
The bikes will carry yellow flags and will also be covered in yellow stickers.
Postal workers will also carry a yellow bag.
Of 7,000 postal bikes, 1,000 have been kitted out with the new enhancements.
Australia Post spokesman Scott McIntyre says the trial results show a definite reduction in accidents.
"We found that some of the incidents fell by 75 per cent in the trial so that's very encouraging results," he said.