"Almost everything on here is salvaged from trash," Smith said. "Most of it found on the side of the road."

"It's primarily all recycled material, kind of going with our theme of reducing, reusing and reclaiming," Koerner said.

Smith explained that their sculpture represents a machine born from the earth that is on a mission to take back the green space of the world with the giant, rotating saw located on top of the cab where the two will sit.

"You have to do a write-up to enter the race," Smith said. "Our write-up was that after 250 years of industrialization, the earth gives rise to Greendustrial Revolution, which is this thing. And the idea is that its saw can remove concrete, asphalt and impervious surface and sort of reclaim it back into green space."

Koerner said it was a total coincidence that their green theme happened to coincide with this year's overall green theme of the race.

Their sculpture uses the same basic frame as their Amish buggy sculpture from the previous two years and Koerner said they have been testing the new trike design extensively.

"We stay local," she said. "From here, we just ride up to UMBC (University of Maryland Baltimore County), there's a couple of good hills that we can practice on."

Though they will be the only two pilots on their sculpture, they said a number of their friends will ride along with them in addition to their official pit crew, in which one pit crew member is officially required for each pilot.

Joseph Smith, Phillip Smith's father who did much of the welding and fabrication for their sculpture, will also ride along with them in the race.

Koerner and Smith agreed that the best way to train for the physically grueling race is to test the machine as often as possible.

"You can ride a bike, but it's not really the same at all," Smith said.

"Even if you're a really good bike rider, your legs aren't used to pushing hundreds and hundreds of pounds," he said.

"We're both pretty active," Koerner said. "You can't really train to pedal a 750-pound contraption."