Waka Kotahi advises people that despite the bridge's historic status, any back-pack sprayers they see are not ghost busters – but moss-busters giving a little love to the gateway to Te Aroha.
Some say that it is fitting that the district mayor is leading the spruce up.
"Coulter Bridge in Te Aroha was built in 1928 and named after Robert Coulter, a former mayor of Te Aroha for 20 years. Now it's getting a clean-up by one of Coulter's successors," says Waka Kotahi system manager Cara Lauder.
The bridge spans the Waihou River and connects thousands of vehicles each day to the Waikato and Coromandel.
"While we understand that the public will be intrigued to see the mayor in mould fighting form, we ask that pedestrians traverse the bridge as quickly as possible to ensure the spraying works can continue safely," says Lauder.
The moss removal is part of efforts to beautify the historic bridge, with painting to follow, and is weather dependent.