Now that Missouri highway planners know they want to widen Interstate-70, instead of building a new road, they have to worry about the cost. Ed Douglas, Vice Chairman of the state Highways and Transportation Commission predicts it will cost $3 billion dollars, but says toll roads may not be the answer. He thinks lawmakers will eventually pay for the work with a combination of tolls, bond sales, and tax increases. The department of transportation is already working on ways to keep delays to a minimum once the work starts. Department staff have come up with preliminary ideas of shifting traffic to keep cars moving.