Mumbai: The World Bank would extend all possible help in implementation of the ambitious ''Vision Mumbai'' project, which entails an expenditure of over $50 billion.

World Bank''s country director for India, Isabel Guerrero gave the assurance to Maharashtra chief minister Vilasrao Deshmukh at the latter''s official residence in Mumbai.

Vision Mumbai project covers development of Mumbai Metropolitan Region, beyond the limits of city and suburbs.

The chief minister said the government was considering a proposal to introduce a ''congestion tax'' to control heavy road traffic in the city.

Maharashtra has also sought assistance from the Bank for its ''Jalswarajya'' water supply project, to be implemented in 3,161 villages, for which Rs1,395 crore were needed, he said.