"Within five years of completion, we saw congestion at pre-construction levels," Katz said.
He agrees that the viaduct needs to be fixed, but he disagrees with the state’s plan to add up to four lanes.
Rebecca White, the spokesperson for the I-70 project, admits the state can’t build its way out of congestion. But she notes that the added lanes will be express lanes, like on Highway 36.
"So that we can handle increasing growth over the years, and always give people a choice to use those lanes," she explained.
The I-70 expansion project is open to public comment right now. Construction could begin in late 2017.