It's going to take $2.3 billion to fix all the county-maintained roads and bridges in poor condition in Macomb County.

The figure, announced Wednesday by County Executive Mark Hackel, is nearly twice as much as one announced last year.

Why?

The county included residential subdivision roads it has to maintain, mostly in the townships, in its updated list; officials said, and more roads are degrading.

The county is responsible for maintaining 44% of the 4,045 miles of roads in Macomb. Of those county-maintained roads, 42% are in poor condition, said Bryan Santo, director of the county roads department.

"We are doing as much as we can with the funding we have," Hackel said during a news conference at the county's communications center in Mount Clemens.

But the funding, he said, just isn't enough.

For years, Hackel has been critical of the Legislature for not picking a funding solution to fix Michigan's crumbling roads.

Wednesday was no different.

He's hoping an updated interactive map, unveiled last year by the county with detailed street-level data by community, will provide more information about the county's road conditions to the public — and pressure legislators to get off the stick and find funding solutions.

Even if that means legislators won't be popular with constituents and may not be re-elected by an upset public.

Hackel's move comes a week before politicians and movers and shakers from across the state swarm to Mackinac Island for the annual Mackinac Policy Conference. Roads, he says, will be a primary talking point.

The message on his annual roadside billboards that motorists see on their way to the conference also is about roads. The signs depict photos of Hackel and potholes and the slogan "Fixing the FUNDING Fixes the ROADS!" A construction zone, he was told, ended up popping up near one of the billboards.

Hackel said two engineering firms have been assessing county-maintained roads for two months and deduced that $2.3 billion was needed to fix the county-maintained roads and bridges. A breakdown is:

$976 million reconstruction cost for 784 lane miles of poor primary and local roads

$78 million reconstruction cost for 39 poor bridges

$1.24 billion for 494 miles of poor subdivision roads

The county is to receive $70 million from the state in Michigan Transportation Funds this year for road repair and reconstruction, officials said. It has about $58 million planned in nearly four dozen road projects this year, Santo said.

But the needs are much higher, officials said.

For example, $300 million is needed in road work in Shelby Township — an amount that is "six times our entire budget" Township Supervisor Rick Stathakis said.

He said it took the township a number of years to get $10 million for its half of $20 million worth of projects for which it is splitting the cost with the county.

Hackel said he supports Gov. Gretchen Whitmer's proposed 45-cent gas tax increase, but said that's still not enough money to get where officials need to be for road funding.

Hackel doesn't believe county officials, including the county Board of Commissioners, would discuss a countywide millage for roads when, he says, it's the Legislature's job to figure this out.

Earlier this year, the Southeast Michigan Council of Governments predicted that road funding in its seven-county region (Livingston, Macomb, Monroe, Oakland, St. Clair, Washtenaw and Wayne) needs to increase from $400 million per year to $1.6 billion per year for 25 years to improve roads to 80% good or fair condition.

It will take an additional $600 million per year over that time period to get roads to 90% good or fair, according to its regional transportation plan.

These figures are only for the needs of federal aid-eligible roads and doesn't include the cost of addressing secondary roads or residential streets.

Last year, SEMCOG said 41% of pavement on federal aid-eligible roads in the seven-county region were in poor condition, and another 40% were in fair condition.

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Contact Christina Hall: chall@freepress.com. Follow her on Twitter: @challreporter.