After nearly a year of heated debates over highway tolls, House Speaker Joe Aresimowicz said Tuesday he is “very comfortable” there are enough Democratic votes in the state House of Representatives to pass Gov. Ned Lamont’s latest truck-only tolls plan in a special session later this month. But the situation was murkier in the state Senate, where Democrats said they have the needed 18 votes to pass the plan, but with certain conditions. Lawmakers hope to pass tolls in a special session because the regular session will be busy with the state budget and multiple other issues that will take much of the legislators’ attention. Lamont’s latest plan would toll trucks only at 12 bridges on six highways across Connecticut to help fund a 10-year, $19.4 billion overhaul of the state’s transportation system.