Village trustees got a first look at the $70 million Route 47 full interchange design Thursday, a project that Huntley hopes to start construction on by 2012.

Route 47 would be reconstructed and widened to three lanes northbound and four lanes southbound, said Peter Johnston, project manager with Graef Inc., the engineering firm heading the project.

Four ramps would be added, he said. There are currently two ramps from Route 47 onto Interstate 90.

Two of the ramps would be "loops" and the other two would be "free flow" ramps similar to what is there presently, Johnston said.

Village Manager Dave Johnson said preliminary plans were submitted a year ago to the Illinois State Toll Highway Authority. The agency reviewed plans and raised a concern about traffic control.

Graef resolved the problem by adding traffic signals at some of the ramps.

The new interchange will also have four tollbooths, however, Johnston said there is a possibility all would be I-PASS lanes. He said I-PASS is the future of tollbooths and expects the highway authority will make a decision on that issue later.

Due to the new interchange, Manning Road will have to be closed, Johnston said. Under Illinois Department of Transportation requirements, the road is too close to the interchange, he said.

Huntley, which along with McHenry and Kane Counties, the highway authority and IDOT contributed toward the cost, is the lead agency for the project. Officials hope to submit the plans to the highway authority by next month.

The goal is to start construction in 2012. The project would take two years, Johnson said.