A new zipline and bus loop would be introduced to Mt Coot-tha under a re-elected Liberal National Party council administration, Brisbane Lord Mayor Graham Quirk will announce on Saturday.

The LNP has promised to spend $11.4 million over four years at Mt Coot-tha if the Quirk administration was re-elected on March 19.

Lord Mayor Graham Quirk has promised to install a zipline at Mt Coot-tha should he be re-elected in two weeks' time. Credit:Andy Zakeli

"One of the key components of this investment will be the introduction of a Coot-tha shuttle service, which will provide a loop bus service every 15 minutes starting at the Legacy car park at the base of the mountain and loop past key locations including the Mt Coot-tha Botanic Gardens and summit," he said.

"This investment will also see the introduction of a zipline, which will be delivered through a partnership with the private sector, and will provide another exciting addition to Mt Coot-tha's recreational foundations.