Millions of dollars are being spent to make sure wildlife and people are safe on the roads.
Back in April, Oro Valley built a multi-million dollar bridge along Oracle Road.
Not for cars.
But for wildlife to cross safety.
Now Marana is spending tax payer money to achieve the same goal, but underground.
The project costs $2.6 million and is funded by RTA bonds.
Janine Spencer is the Environmental Project Manager and she says 1,000 animals are killed every month from being hit crossing this road.
"You multiple that by all the roads that don't have wildlife crossings. That's a big impact on wildlife," said Spencer.
She's says the town put similar culverts on another road and the turnout.
"They found no road kill so you know it really works."
Fences are put in place to protect animals and lead them to these under ground passage ways to protect them from traffic.
"The engineers went through and looked for areas where they could save money so we put them in places that were going to have to have big culverts anyway and just a little upsizing will make."