The Western Mail understands Blues' board members will give the green light to relocate across the capital at the Bluebirds' new 25,000-seat stadium which is about to begin construction.
The move will signal an end to more than 130 years of rugby at the Arms Park and bring the capital in line with Swansea City and the Ospreys, who share the Liberty Stadium.
Cardiff City chairman Peter Ridsdale and Blues chief executive Bob Norster have already held a number of meetings which have been described as "very positive".
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