Michael Manville, associate professor of urban planning, spoke with WGBH News in Boston about a proposal to add dedicated toll lanes on Massachusetts’ major highways. As the state considers options to alleviate traffic during rush hour, Gov. Charlie Baker has come out in support of adding “managed lanes” that let drivers choose whether to pay a fee for a quicker commute. “While drivers have a choice to commute in a faster lane for a cost, drivers who remain in the un-tolled lane will also experience lighter volume from those who peel off for the faster lane,” the governor explained. Manville said the benefits of creating such lanes are clear. “Almost anytime these managed lanes have been put in, you see traffic flowing much more smoothly, delay going down and many more vehicles being moved in these managed lanes. They are, at this point, a proven intervention,” he said.