Brisbane's deputy mayor on Tuesday night threatened to cancel the popular Maroon Glider bus service to save $5 million if the state government did not help with the $10 million in costs to build roadworks to support the Queens Wharf casino and hotel development.

That "high stakes" call is indicative of the simmering tension between Brisbane City Council and the Palaszczuk Government, sources suggest.

Maroon City Glider - Brisbane City Council threatens to cancel it to save $5 million.

The Maroon CityGlider carries 1.2 million passengers a year, but the state-government transport body Translink refuses to pay for it, deputy mayor Cr Adrian Schrinner said.

Brisbane City Council's senior councillors are still seething at the Queensland Government's indifference to the Council having to close William Street for six years and pay the $10 million in costs for changes to 11 inner-city intersections and re-routing 50 bus services to allow the multi-billion new casino and hotel development to go ahead.