Behind the scenes, Lamont’s administration is applying a full court press to try to win approval for tolls, which would be installed every six miles on I-91, 84, 95 and Route 15. The governor’s office has tasked top aides with convincing potential swing voters in the legislature that tolling all vehicles — not just trucks, as Lamont campaigned on last year — is the only viable option for the state to fix its crumbling and gridlocked transportation infrastructure.