A busy state highway between Lawrence and Kansas City could be widened to six lanes, paid for with so-called “high-occupancy toll lanes.”

A new study be regional transportation officials suggests mass transit and carpooling would be free along Kansas Highway 10, but single-occupant vehicles would have to pay a toll.

The Five County Regional Transportation Study suggests that K-10 between Lawrence and Johnson County become a partial toll road.

KDoT says Thursday the highway should be widened in the next 20 years to six lanes.

The report identifies projects for future years, after the current state roads program ends in 2020.