I don't have infrastructure separated out by itself, but the federal-led spending, of which infrastructure is a big part, adds 0.1 percentage point to growth in fiscal years 2018-19 to 2020-21 each year. What it does every year is to lift growth somewhat, and the level of GDP at the end of the forecast is higher because of that. It's just not much different from what it was in January. That's all, but it doesn't mean it's not contributing to growth.
On April 23rd, 2018. See this statement in context.