Eight states—Georgia, Idaho, Iowa, Michigan, Nebraska, South Dakota, Utah and Washington—raised their gas taxes in 2015. Two other states—Kentucky and North Carolina—made adjustments to their gas tax mechanisms to make revenues more reliable. The state of Delaware meanwhile enacted legislation to raise several vehicle and license fees in order to fund road repair and maintenance. And states such as Maine and Texas approved ballot measures that will result in more money going to transportation. All that activity surpassed 2013 when six states produced major transportation revenue packages. But despite all that activity and despite the fact that 2015 could see Congress approve a new long-term federal transportation bill, 2016 also could see a large number of states join the club, particularly if many of those states that have come close in recent years or have had processes in place to examine revenue options end up moving forward. Here’s a roundup of the states to watch in transportation funding next year and some additional resources where you can read more.