Dubai’s metro rail construction will cost 75% more than what was originally estimated, according to officials .

Transport officials estimate the cost of the metro’s Red Line and Green line will climb from Dh16bn (US$4.4bn) to Dh28bn by June 2010. The Red Line is scheduled to open on 9 September.

The chairman of Dubai’s Roads & Transport Authority Mattar al Tayer said the increase in the budget was due to additions to the original plan.

The additions include extending the metro line by 4.5km, and building extra stations and a new depot.

The completion of the Green Line has been pushed back by three months and only ten out of a total 29 stations will be operational for the Red Line.

The project is being financed by the Dubai government and carried out by the Dubai Roads & Transport Authority.

The original contract for the project was signed for AED15.5bn ($4.2bn) in 2005.