Industry leaders say a number of infrastructure jobs could be lost if the full list of shovel ready projects isn't revealed.
Early this month the Government announced it had selected 150 projects valued at nearly $3 billion.
Four weeks later, details of only 30 have been released.
Infrastructure New Zealand chief executive Paul Blair told Kerre McIvor contractors feel they have been left in the dark - and it would help business confidence and planning to know more.
"I know of more than a handful of large and small companies that are preparing proposals now to make staff redundant."
Blair says they urgently need a heads up from the Government.
“This is a situation where we need to move quickly from announcement - to jobs being created and money being spent.”