The Senate Transportation, Highways and Military Affairs Committee approved a bill last week, directing the Wyoming DOT to work on a tolling plan for the road, according to reports by the Associated Press.
After the study is completed, a task which could take two years, the legislature would have to assess the study and take any further action before tolling would begin, the AP says.
"The tolled configuration will allow interstate 80 to be maintained and to be operated in a way that will reduce increasing traffic congestion, delays, hazards, injuries and fatalities," the bill said.
In 2008, the state hired consultant firm Parsons Brinckerhoff to conduct the first phase of the study, which found that toll rates for trucks could be up to $116, while cars would pay up to $9.50.
The most recent study, conducted last summer, calculated cost estimates for additional lanes as well as toll amounts for commercial and non-commercial traffic.