Representatives of the main political parties are to attend a "questions and answers"-style session in Dublin today where the topic will be their agendas for the Dublin region.

The event is being organised by the Dublin Chamber of Commerce, which, in a booklet to be published today, has set out what it says is required for the region.

"The region's inadequate infrastructure is leading to increased business costs and a diminished quality of life, hindering Dublin's ability to compete internationally for investment and jobs," according to the chamber.

"Dublin business is tired of excuses for the failure to provide the region with the world-class infrastructure it needs."

Over the coming years, the chamber said, it wanted delivery and not more feasibility studies and "decision-making paralysis".

Among the initiatives called for by the chamber is the establishment of a Greater Dublin Area Authority, led by a directly elected mayor.

It also wants a framework to explain how hospitals, schools, creches, the energy grid, water supply and waste services will facilitate growing demand.

It wants the immediate establishment of a Dublin Transport Authority on a non-statutory basis pending the enactment of enabling legislation and the expansion of the bus fleet by 200 buses within two years.

It also wants construction to begin on the Eastern Bypass and the Dublin outer orbital road.

On Dublin Port, it said: "Make a decision on the future of Dublin Port. Either develop it significantly, or move it elsewhere."

The Greater Dublin Area accounts for approximately half of all national output and two in every five jobs in the country, according to the chamber.

"As a city-region, it is a driver of economic growth, innovation and employment for the whole island."