What is the expected revenue from the Egypt project for the next three quarters
ments, there aren't a lot of trend differences when we look at our international business around the world. And we often look at this between the mature and the developing or the mature and project-oriented markets, and there aren't significant trends in the data that show that one is driving growth more than the other. Again, we're in a unique position where all markets are driving riding growth trends, and it's for different reasons. The food security population growth issues, some of those longer-term drivers are certainly impacted in those developing markets, strong commodity prices are impacting those mature markets like Australia, New Zealand, Brazil and Western Europe. So we don't see a lot of differences that are interesting right now. And for different reasons, again, we're seeing growth in all of those.
How long it sustains itself and are those growth rates going to sustain or increase? We continue to see good long-term market drivers in those markets. So predicting whether the rate or the slope of the line will increase/decrease is maybe difficult to do right now, but we do believe in the long-term growth and the potential in both the mature and developing markets internationally.
Jon Braatz -- Kansas City Capital Associates -- Analyst
Okay. Thank you. Brian, the backlog is up rather significantly. You mentioned some supply chain issues and so on. How much of an influence or how much did those issues impact the backlog number? Is it significant?
Brian L. Ketcham -- Senior Vice President & Chief Financial Officer
I wouldn't say because of delivery constraints or anything like that, Jon. Lead times obviously have extended, but both domestic and international backlogs are up. Obviously, the biggest increase is related to the $36 million Egypt project. But when we look at Brazil, that backlog is up more than double what it was a year ago. But it's -- the backlog is up in all of the international regions. In North America, at the end of the spring selling season, but the backlog is still up year-over-year.
Jon Braatz -- Kansas City Capital Associates -- Analyst
Okay. How extended are the lead times now versus maybe a year ago?
Brian L. Ketcham -- Senior Vice President & Chief Financial Officer
In the US, I think as the volume -- seasonal volume drops off, I think the lead times are getting shorter, again, kind of more in that traditional, let's say, three to four-week time frame. But Brazil, obviously, as I mentioned, some of the longer lead times there, you could go five or six months. So it varies from different parts of the world.
Jon Braatz -- Kansas City Capital Associates -- Analyst
Okay. All right, Brian. Thank you very much.
Brian L. Ketcham -- Senior Vice President & Chief Financial Officer
Thank you.
Operator
Next question is from Nathan Jones with Stifel. Please go ahead.
Adam Farley -- Stifel Nicolaus -- Analyst
Good morning. This is Adam Farley on for Nathan.
Brian L. Ketcham -- Senior Vice President & Chief Financial Officer
Good morning, Adam.
Adam Farley -- Stifel Nicolaus -- Analyst
I was wondering if you could help us with the cadence of the Egypt project, is it going to ramp up once it starts shipping in June or should it be more evenly split?
Brian L. Ketcham -- Senior Vice President & Chief Financial Officer
Yes, this is Brian. I would think about it this way, $36 million project really spread over the next three quarters. Weighted probably more heavily to fourth quarter, first quarter of 2022 with the remainder going to the second quarter.
Adam Farley -- Stifel Nicolaus -- Analyst
Okay, thanks. And then shifting over to the infrastructure business, could you just provide an update on the Road Zipper project funnel and maybe any additional color on when you think some projects are going to begin to convert? Thanks.
Randy A. Wood -- President & Chief Executive Officer
You bet. We're still very pleased with the shift left strategy that we've deployed in Road Zipper, and we continue to put projects into the funnel. We continue to manage projects through the funnel. And in terms of total dollars, w
ments, there aren't a lot of trend differences when we look at our international business around the world. And we often look at this between the mature and the developing or the mature and project-oriented markets, and there aren't significant trends in the data that show that one is driving growth more than the other. Again, we're in a unique position where all markets are driving riding growth trends, and it's for different reasons. The food security population growth issues, some of those longer-term drivers are certainly impacted in those developing markets, strong commodity prices are impacting those mature markets like Australia, New Zealand, Brazil and Western Europe. So we don't see a lot of differences that are interesting right now. And for different reasons, again, we're seeing growth in all of those.
How long it sustains itself and are those growth rates going to sustain or increase? We continue to see good long-term market drivers in those markets. So predicting whether the rate or the slope of the line will increase/decrease is maybe difficult to do right now, but we do believe in the long-term growth and the potential in both the mature and developing markets internationally.
Jon Braatz -- Kansas City Capital Associates -- Analyst
Okay. Thank you. Brian, the backlog is up rather significantly. You mentioned some supply chain issues and so on. How much of an influence or how much did those issues impact the backlog number? Is it significant?
Brian L. Ketcham -- Senior Vice President & Chief Financial Officer
I wouldn't say because of delivery constraints or anything like that, Jon. Lead times obviously have extended, but both domestic and international backlogs are up. Obviously, the biggest increase is related to the $36 million Egypt project. But when we look at Brazil, that backlog is up more than double what it was a year ago. But it's -- the backlog is up in all of the international regions. In North America, at the end of the spring selling season, but the backlog is still up year-over-year.
Jon Braatz -- Kansas City Capital Associates -- Analyst
Okay. How extended are the lead times now versus maybe a year ago?
Brian L. Ketcham -- Senior Vice President & Chief Financial Officer
 In the US, I think as the volume -- seasonal volume drops off, I think the lead times are getting shorter, again, kind of more in that traditional, let's say, three to four-week time frame. But Brazil, obviously, as I mentioned, some of the longer lead times there, you could go five or six months. So it varies from different parts of the world.
Jon Braatz -- Kansas City Capital Associates -- Analyst
Okay. All right, Brian. Thank you very much.
Brian L. Ketcham -- Senior Vice President & Chief Financial Officer
Thank you.
Operator
Next question is from Nathan Jones with Stifel. Please go ahead.
Adam Farley -- Stifel Nicolaus -- Analyst
Good morning. This is Adam Farley on for Nathan.
Brian L. Ketcham -- Senior Vice President & Chief Financial Officer
Good morning, Adam.
Adam Farley -- Stifel Nicolaus -- Analyst
I was wondering if you could help us with the cadence of the Egypt project, is it going to ramp up once it starts shipping in June or should it be more evenly split?
Brian L. Ketcham -- Senior Vice President & Chief Financial Officer
Yes, this is Brian. I would think about it this way, $36 million project really spread over the next three quarters. Weighted probably more heavily to fourth quarter, first quarter of 2022 with the remainder going to the second quarter.
Adam Farley -- Stifel Nicolaus -- Analyst
Okay, thanks. And then shifting over to the infrastructure business, could you just provide an update on the Road Zipper project funnel and maybe any additional color on when you think some projects are going to begin to convert? Thanks.
Randy A. Wood -- President & Chief Executive Officer
You bet. We're still very pleased with the shift left strategy that we've deployed in Road Zipper, and we continue to put projects into the funnel. We continue to manage projects through the funnel. And in terms of total dollars, w