Business leaders are to challenge a decision to stop a park-and-ride scheme.
Brighton City Centre Business Forum put its case for the car park project at Braypool to the city council last year.
Members said the 1,000-space plan would reduce vehicle movements in the city by 700,000 a year and raise more than £1.7 million.
However, the council passed a resolution that no development should be allowed north of the A27.
In a report, the forum said it would appeal against the decision and take on the council at a public inquiry into the Local Plan in September.
It said Brighton and Hove, with 250 spaces, had the lowest park-and-ride capacity of 26 towns and cities it had looked at.
Bristol had 3,900, Bath 1,930, Cambridge 2,300 and Bedford 700.
The report covers the first three years of the forum as well as looking to the future.
An example of its work was persuading a firm to put advertisements around the Clock Tower while it was restored.
Part of the money has been used to cover the city with bunting for its European Capital of Culture bid.
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