The architect of Ottawa's Transitway system says the capital's new plan for transit is "pathetic" and a waste of taxpayer money.

Former regional chair Andy Haydon told reporters Monday that light rail won't work in the capital and the city's best bet for the future is to expand the current bus transit system.

"The public in Ottawa know full-well there's something rotten in the city's transit proposal, fuelled by unreliable data by transit staff that doesn't have any transit experience or expertise," said Haydon.

"The proposal is trains, trains, trains with a total inability to technically justify it."

Haydon is also calling on the federal and provincial governments to pull the plug on light rail funding. He says the estimated cost for the light rail plan proposed by city staff is close to $2 billion short.