SPRINGFIELD — In November, voters approved a third change to the state constitution in three years, green-lighting language that locks up state funds exclusively for roads and transportation.That followed two changes in 2014 that sought to solidify rights for voters and crime victims.Now lawmakers are proposing several more constitutional changes for the November 2018 ballot. Members of the House of Representatives have introduced 23 constitutional amendments so far this legislative session. Members of the Senate have …